DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

S66 Injury of muscle, fascia and tendon at wrist and hand level

  • Header · not billable
  • Codes take a 7th character

S66 is not billable. The category heads 540 billable codes in FY2027, grouped under 8 subdivisions. Its codes take a 7th character, so none is complete with fewer than 7 characters.

Index → code

  • Injurymuscle (and fascia) (and tendon)hand (level) → S66.90-
  • Injurymuscle (and fascia) (and tendon)thumbintrinsic → S66.40-
  • Injurymuscle (and fascia) (and tendon)fingerintrinsic → S66.509

Where it sits

  1. Chapter 19 Injury, poisoning and certain other consequences of external causes (S00-T88)
  2. S60-S69 Injuries to the wrist, hand and fingers (S60-S69)
  3. S66 Injury of muscle, fascia and tendon at wrist and hand level
Billable codes
540
Subdivisions
8
CC / MCC codes
45 / 0
HCC V28 codes
0
New FY2027
0
Index entries
80

Codes in S66

  1. S66.0
    Injury of long flexor muscle, fascia and tendon of thumb at wrist and hand level
    Header
  2. S66.00
    Unspecified injury of long flexor muscle, fascia and tendon of thumb at wrist and hand level
    Header
  3. S66.001
    Unspecified injury of long flexor muscle, fascia and tendon of right thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  4. S66.002
    Unspecified injury of long flexor muscle, fascia and tendon of left thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  5. S66.009
    Unspecified injury of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  6. S66.01
    Strain of long flexor muscle, fascia and tendon of thumb at wrist and hand level
    Header
  7. S66.011
    Strain of long flexor muscle, fascia and tendon of right thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  8. S66.012
    Strain of long flexor muscle, fascia and tendon of left thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  9. S66.019
    Strain of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  10. S66.02
    Laceration of long flexor muscle, fascia and tendon of thumb at wrist and hand level
    Header
  11. S66.021
    Laceration of long flexor muscle, fascia and tendon of right thumb at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  12. S66.022
    Laceration of long flexor muscle, fascia and tendon of left thumb at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  13. S66.029
    Laceration of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  14. S66.09
    Other specified injury of long flexor muscle, fascia and tendon of thumb at wrist and hand level
    Header
  15. S66.091
    Other specified injury of long flexor muscle, fascia and tendon of right thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  16. S66.092
    Other specified injury of long flexor muscle, fascia and tendon of left thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  17. S66.099
    Other specified injury of long flexor muscle, fascia and tendon of unspecified thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  18. S66.1
    Injury of flexor muscle, fascia and tendon of other and unspecified finger at wrist and hand level
    Header
    Excludes2 1

    Excludes2

    • Injury of long flexor muscle, fascia and tendon of thumb at wrist and hand level (S66.0-) S66.0
  19. S66.10
    Unspecified injury of flexor muscle, fascia and tendon of other and unspecified finger at wrist and hand level
    Header
  20. S66.100
    Unspecified injury of flexor muscle, fascia and tendon of right index finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  21. S66.101
    Unspecified injury of flexor muscle, fascia and tendon of left index finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  22. S66.102
    Unspecified injury of flexor muscle, fascia and tendon of right middle finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  23. S66.103
    Unspecified injury of flexor muscle, fascia and tendon of left middle finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  24. S66.104
    Unspecified injury of flexor muscle, fascia and tendon of right ring finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  25. S66.105
    Unspecified injury of flexor muscle, fascia and tendon of left ring finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  26. S66.106
    Unspecified injury of flexor muscle, fascia and tendon of right little finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  27. S66.107
    Unspecified injury of flexor muscle, fascia and tendon of left little finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  28. S66.108
    Unspecified injury of flexor muscle, fascia and tendon of other finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Unspecified injury of flexor muscle, fascia and tendon of specified finger with unspecified laterality at wrist and hand level
  29. S66.109
    Unspecified injury of flexor muscle, fascia and tendon of unspecified finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  30. S66.11
    Strain of flexor muscle, fascia and tendon of other and unspecified finger at wrist and hand level
    Header
  31. S66.110
    Strain of flexor muscle, fascia and tendon of right index finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  32. S66.111
    Strain of flexor muscle, fascia and tendon of left index finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  33. S66.112
    Strain of flexor muscle, fascia and tendon of right middle finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  34. S66.113
    Strain of flexor muscle, fascia and tendon of left middle finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  35. S66.114
    Strain of flexor muscle, fascia and tendon of right ring finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  36. S66.115
    Strain of flexor muscle, fascia and tendon of left ring finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  37. S66.116
    Strain of flexor muscle, fascia and tendon of right little finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  38. S66.117
    Strain of flexor muscle, fascia and tendon of left little finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  39. S66.118
    Strain of flexor muscle, fascia and tendon of other finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Strain of flexor muscle, fascia and tendon of specified finger with unspecified laterality at wrist and hand level
  40. S66.119
    Strain of flexor muscle, fascia and tendon of unspecified finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  41. S66.12
    Laceration of flexor muscle, fascia and tendon of other and unspecified finger at wrist and hand level
    Header
  42. S66.120
    Laceration of flexor muscle, fascia and tendon of right index finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  43. S66.121
    Laceration of flexor muscle, fascia and tendon of left index finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  44. S66.122
    Laceration of flexor muscle, fascia and tendon of right middle finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  45. S66.123
    Laceration of flexor muscle, fascia and tendon of left middle finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  46. S66.124
    Laceration of flexor muscle, fascia and tendon of right ring finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  47. S66.125
    Laceration of flexor muscle, fascia and tendon of left ring finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  48. S66.126
    Laceration of flexor muscle, fascia and tendon of right little finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  49. S66.127
    Laceration of flexor muscle, fascia and tendon of left little finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  50. S66.128
    Laceration of flexor muscle, fascia and tendon of other finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Laceration of flexor muscle, fascia and tendon of specified finger with unspecified laterality at wrist and hand level
  51. S66.129
    Laceration of flexor muscle, fascia and tendon of unspecified finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  52. S66.19
    Other injury of flexor muscle, fascia and tendon of other and unspecified finger at wrist and hand level
    Header
  53. S66.190
    Other injury of flexor muscle, fascia and tendon of right index finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  54. S66.191
    Other injury of flexor muscle, fascia and tendon of left index finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  55. S66.192
    Other injury of flexor muscle, fascia and tendon of right middle finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  56. S66.193
    Other injury of flexor muscle, fascia and tendon of left middle finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  57. S66.194
    Other injury of flexor muscle, fascia and tendon of right ring finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  58. S66.195
    Other injury of flexor muscle, fascia and tendon of left ring finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  59. S66.196
    Other injury of flexor muscle, fascia and tendon of right little finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  60. S66.197
    Other injury of flexor muscle, fascia and tendon of left little finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  61. S66.198
    Other injury of flexor muscle, fascia and tendon of other finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Other injury of flexor muscle, fascia and tendon of specified finger with unspecified laterality at wrist and hand level
  62. S66.199
    Other injury of flexor muscle, fascia and tendon of unspecified finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  63. S66.2
    Injury of extensor muscle, fascia and tendon of thumb at wrist and hand level
    Header
  64. S66.20
    Unspecified injury of extensor muscle, fascia and tendon of thumb at wrist and hand level
    Header
  65. S66.201
    Unspecified injury of extensor muscle, fascia and tendon of right thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  66. S66.202
    Unspecified injury of extensor muscle, fascia and tendon of left thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  67. S66.209
    Unspecified injury of extensor muscle, fascia and tendon of unspecified thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  68. S66.21
    Strain of extensor muscle, fascia and tendon of thumb at wrist and hand level
    Header
  69. S66.211
    Strain of extensor muscle, fascia and tendon of right thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  70. S66.212
    Strain of extensor muscle, fascia and tendon of left thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  71. S66.219
    Strain of extensor muscle, fascia and tendon of unspecified thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  72. S66.22
    Laceration of extensor muscle, fascia and tendon of thumb at wrist and hand level
    Header
  73. S66.221
    Laceration of extensor muscle, fascia and tendon of right thumb at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  74. S66.222
    Laceration of extensor muscle, fascia and tendon of left thumb at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  75. S66.229
    Laceration of extensor muscle, fascia and tendon of unspecified thumb at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  76. S66.29
    Other specified injury of extensor muscle, fascia and tendon of thumb at wrist and hand level
    Header
  77. S66.291
    Other specified injury of extensor muscle, fascia and tendon of right thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  78. S66.292
    Other specified injury of extensor muscle, fascia and tendon of left thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  79. S66.299
    Other specified injury of extensor muscle, fascia and tendon of unspecified thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  80. S66.3
    Injury of extensor muscle, fascia and tendon of other and unspecified finger at wrist and hand level
    Header
    Excludes2 1

    Excludes2

    • Injury of extensor muscle, fascia and tendon of thumb at wrist and hand level (S66.2-) S66.2
  81. S66.30
    Unspecified injury of extensor muscle, fascia and tendon of other and unspecified finger at wrist and hand level
    Header
  82. S66.300
    Unspecified injury of extensor muscle, fascia and tendon of right index finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  83. S66.301
    Unspecified injury of extensor muscle, fascia and tendon of left index finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  84. S66.302
    Unspecified injury of extensor muscle, fascia and tendon of right middle finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  85. S66.303
    Unspecified injury of extensor muscle, fascia and tendon of left middle finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  86. S66.304
    Unspecified injury of extensor muscle, fascia and tendon of right ring finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  87. S66.305
    Unspecified injury of extensor muscle, fascia and tendon of left ring finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  88. S66.306
    Unspecified injury of extensor muscle, fascia and tendon of right little finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  89. S66.307
    Unspecified injury of extensor muscle, fascia and tendon of left little finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  90. S66.308
    Unspecified injury of extensor muscle, fascia and tendon of other finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Unspecified injury of extensor muscle, fascia and tendon of specified finger with unspecified laterality at wrist and hand level
  91. S66.309
    Unspecified injury of extensor muscle, fascia and tendon of unspecified finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  92. S66.31
    Strain of extensor muscle, fascia and tendon of other and unspecified finger at wrist and hand level
    Header
  93. S66.310
    Strain of extensor muscle, fascia and tendon of right index finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  94. S66.311
    Strain of extensor muscle, fascia and tendon of left index finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  95. S66.312
    Strain of extensor muscle, fascia and tendon of right middle finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  96. S66.313
    Strain of extensor muscle, fascia and tendon of left middle finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  97. S66.314
    Strain of extensor muscle, fascia and tendon of right ring finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  98. S66.315
    Strain of extensor muscle, fascia and tendon of left ring finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  99. S66.316
    Strain of extensor muscle, fascia and tendon of right little finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  100. S66.317
    Strain of extensor muscle, fascia and tendon of left little finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  101. S66.318
    Strain of extensor muscle, fascia and tendon of other finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Strain of extensor muscle, fascia and tendon of specified finger with unspecified laterality at wrist and hand level
  102. S66.319
    Strain of extensor muscle, fascia and tendon of unspecified finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  103. S66.32
    Laceration of extensor muscle, fascia and tendon of other and unspecified finger at wrist and hand level
    Header
  104. S66.320
    Laceration of extensor muscle, fascia and tendon of right index finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  105. S66.321
    Laceration of extensor muscle, fascia and tendon of left index finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  106. S66.322
    Laceration of extensor muscle, fascia and tendon of right middle finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  107. S66.323
    Laceration of extensor muscle, fascia and tendon of left middle finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  108. S66.324
    Laceration of extensor muscle, fascia and tendon of right ring finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  109. S66.325
    Laceration of extensor muscle, fascia and tendon of left ring finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  110. S66.326
    Laceration of extensor muscle, fascia and tendon of right little finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  111. S66.327
    Laceration of extensor muscle, fascia and tendon of left little finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  112. S66.328
    Laceration of extensor muscle, fascia and tendon of other finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Laceration of extensor muscle, fascia and tendon of specified finger with unspecified laterality at wrist and hand level
  113. S66.329
    Laceration of extensor muscle, fascia and tendon of unspecified finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  114. S66.39
    Other injury of extensor muscle, fascia and tendon of other and unspecified finger at wrist and hand level
    Header
  115. S66.390
    Other injury of extensor muscle, fascia and tendon of right index finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  116. S66.391
    Other injury of extensor muscle, fascia and tendon of left index finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  117. S66.392
    Other injury of extensor muscle, fascia and tendon of right middle finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  118. S66.393
    Other injury of extensor muscle, fascia and tendon of left middle finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  119. S66.394
    Other injury of extensor muscle, fascia and tendon of right ring finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  120. S66.395
    Other injury of extensor muscle, fascia and tendon of left ring finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  121. S66.396
    Other injury of extensor muscle, fascia and tendon of right little finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  122. S66.397
    Other injury of extensor muscle, fascia and tendon of left little finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  123. S66.398
    Other injury of extensor muscle, fascia and tendon of other finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Other injury of extensor muscle, fascia and tendon of specified finger with unspecified laterality at wrist and hand level
  124. S66.399
    Other injury of extensor muscle, fascia and tendon of unspecified finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  125. S66.4
    Injury of intrinsic muscle, fascia and tendon of thumb at wrist and hand level
    Header
  126. S66.40
    Unspecified injury of intrinsic muscle, fascia and tendon of thumb at wrist and hand level
    Header
  127. S66.401
    Unspecified injury of intrinsic muscle, fascia and tendon of right thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  128. S66.402
    Unspecified injury of intrinsic muscle, fascia and tendon of left thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  129. S66.409
    Unspecified injury of intrinsic muscle, fascia and tendon of unspecified thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  130. S66.41
    Strain of intrinsic muscle, fascia and tendon of thumb at wrist and hand level
    Header
  131. S66.411
    Strain of intrinsic muscle, fascia and tendon of right thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  132. S66.412
    Strain of intrinsic muscle, fascia and tendon of left thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  133. S66.419
    Strain of intrinsic muscle, fascia and tendon of unspecified thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  134. S66.42
    Laceration of intrinsic muscle, fascia and tendon of thumb at wrist and hand level
    Header
  135. S66.421
    Laceration of intrinsic muscle, fascia and tendon of right thumb at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  136. S66.422
    Laceration of intrinsic muscle, fascia and tendon of left thumb at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  137. S66.429
    Laceration of intrinsic muscle, fascia and tendon of unspecified thumb at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  138. S66.49
    Other specified injury of intrinsic muscle, fascia and tendon of thumb at wrist and hand level
    Header
  139. S66.491
    Other specified injury of intrinsic muscle, fascia and tendon of right thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  140. S66.492
    Other specified injury of intrinsic muscle, fascia and tendon of left thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  141. S66.499
    Other specified injury of intrinsic muscle, fascia and tendon of unspecified thumb at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  142. S66.5
    Injury of intrinsic muscle, fascia and tendon of other and unspecified finger at wrist and hand level
    Header
    Excludes2 1

    Excludes2

    • injury of intrinsic muscle, fascia and tendon of thumb at wrist and hand level (S66.4-) S66.4
  143. S66.50
    Unspecified injury of intrinsic muscle, fascia and tendon of other and unspecified finger at wrist and hand level
    Header
  144. S66.500
    Unspecified injury of intrinsic muscle, fascia and tendon of right index finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  145. S66.501
    Unspecified injury of intrinsic muscle, fascia and tendon of left index finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  146. S66.502
    Unspecified injury of intrinsic muscle, fascia and tendon of right middle finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  147. S66.503
    Unspecified injury of intrinsic muscle, fascia and tendon of left middle finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  148. S66.504
    Unspecified injury of intrinsic muscle, fascia and tendon of right ring finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  149. S66.505
    Unspecified injury of intrinsic muscle, fascia and tendon of left ring finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  150. S66.506
    Unspecified injury of intrinsic muscle, fascia and tendon of right little finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  151. S66.507
    Unspecified injury of intrinsic muscle, fascia and tendon of left little finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  152. S66.508
    Unspecified injury of intrinsic muscle, fascia and tendon of other finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Unspecified injury of intrinsic muscle, fascia and tendon of specified finger with unspecified laterality at wrist and hand level
  153. S66.509
    Unspecified injury of intrinsic muscle, fascia and tendon of unspecified finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  154. S66.51
    Strain of intrinsic muscle, fascia and tendon of other and unspecified finger at wrist and hand level
    Header
  155. S66.510
    Strain of intrinsic muscle, fascia and tendon of right index finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  156. S66.511
    Strain of intrinsic muscle, fascia and tendon of left index finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  157. S66.512
    Strain of intrinsic muscle, fascia and tendon of right middle finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  158. S66.513
    Strain of intrinsic muscle, fascia and tendon of left middle finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  159. S66.514
    Strain of intrinsic muscle, fascia and tendon of right ring finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  160. S66.515
    Strain of intrinsic muscle, fascia and tendon of left ring finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  161. S66.516
    Strain of intrinsic muscle, fascia and tendon of right little finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  162. S66.517
    Strain of intrinsic muscle, fascia and tendon of left little finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  163. S66.518
    Strain of intrinsic muscle, fascia and tendon of other finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Strain of intrinsic muscle, fascia and tendon of specified finger with unspecified laterality at wrist and hand level
  164. S66.519
    Strain of intrinsic muscle, fascia and tendon of unspecified finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  165. S66.52
    Laceration of intrinsic muscle, fascia and tendon of other and unspecified finger at wrist and hand level
    Header
  166. S66.520
    Laceration of intrinsic muscle, fascia and tendon of right index finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  167. S66.521
    Laceration of intrinsic muscle, fascia and tendon of left index finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  168. S66.522
    Laceration of intrinsic muscle, fascia and tendon of right middle finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  169. S66.523
    Laceration of intrinsic muscle, fascia and tendon of left middle finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  170. S66.524
    Laceration of intrinsic muscle, fascia and tendon of right ring finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  171. S66.525
    Laceration of intrinsic muscle, fascia and tendon of left ring finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  172. S66.526
    Laceration of intrinsic muscle, fascia and tendon of right little finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  173. S66.527
    Laceration of intrinsic muscle, fascia and tendon of left little finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  174. S66.528
    Laceration of intrinsic muscle, fascia and tendon of other finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Laceration of intrinsic muscle, fascia and tendon of specified finger with unspecified laterality at wrist and hand level
  175. S66.529
    Laceration of intrinsic muscle, fascia and tendon of unspecified finger at wrist and hand level +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  176. S66.59
    Other injury of intrinsic muscle, fascia and tendon of other and unspecified finger at wrist and hand level
    Header
  177. S66.590
    Other injury of intrinsic muscle, fascia and tendon of right index finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  178. S66.591
    Other injury of intrinsic muscle, fascia and tendon of left index finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  179. S66.592
    Other injury of intrinsic muscle, fascia and tendon of right middle finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  180. S66.593
    Other injury of intrinsic muscle, fascia and tendon of left middle finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  181. S66.594
    Other injury of intrinsic muscle, fascia and tendon of right ring finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  182. S66.595
    Other injury of intrinsic muscle, fascia and tendon of left ring finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  183. S66.596
    Other injury of intrinsic muscle, fascia and tendon of right little finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  184. S66.597
    Other injury of intrinsic muscle, fascia and tendon of left little finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  185. S66.598
    Other injury of intrinsic muscle, fascia and tendon of other finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Other injury of intrinsic muscle, fascia and tendon of specified finger with unspecified laterality at wrist and hand level
  186. S66.599
    Other injury of intrinsic muscle, fascia and tendon of unspecified finger at wrist and hand level +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  187. S66.8
    Injury of other specified muscles, fascia and tendons at wrist and hand level
    Header
  188. S66.80
    Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level
    Header
  189. S66.801
    Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, right hand +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  190. S66.802
    Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, left hand +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  191. S66.809
    Unspecified injury of other specified muscles, fascia and tendons at wrist and hand level, unspecified hand +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  192. S66.81
    Strain of other specified muscles, fascia and tendons at wrist and hand level
    Header
  193. S66.811
    Strain of other specified muscles, fascia and tendons at wrist and hand level, right hand +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  194. S66.812
    Strain of other specified muscles, fascia and tendons at wrist and hand level, left hand +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  195. S66.819
    Strain of other specified muscles, fascia and tendons at wrist and hand level, unspecified hand +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  196. S66.82
    Laceration of other specified muscles, fascia and tendons at wrist and hand level
    Header
  197. S66.821
    Laceration of other specified muscles, fascia and tendons at wrist and hand level, right hand +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  198. S66.822
    Laceration of other specified muscles, fascia and tendons at wrist and hand level, left hand +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  199. S66.829
    Laceration of other specified muscles, fascia and tendons at wrist and hand level, unspecified hand +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  200. S66.89
    Other injury of other specified muscles, fascia and tendons at wrist and hand level
    Header
  201. S66.891
    Other injury of other specified muscles, fascia and tendons at wrist and hand level, right hand +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  202. S66.892
    Other injury of other specified muscles, fascia and tendons at wrist and hand level, left hand +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  203. S66.899
    Other injury of other specified muscles, fascia and tendons at wrist and hand level, unspecified hand +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  204. S66.9
    Injury of unspecified muscle, fascia and tendon at wrist and hand level
    Header
  205. S66.90
    Unspecified injury of unspecified muscle, fascia and tendon at wrist and hand level
    Header
  206. S66.901
    Unspecified injury of unspecified muscle, fascia and tendon at wrist and hand level, right hand +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  207. S66.902
    Unspecified injury of unspecified muscle, fascia and tendon at wrist and hand level, left hand +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  208. S66.909
    Unspecified injury of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  209. S66.91
    Strain of unspecified muscle, fascia and tendon at wrist and hand level
    Header
  210. S66.911
    Strain of unspecified muscle, fascia and tendon at wrist and hand level, right hand +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  211. S66.912
    Strain of unspecified muscle, fascia and tendon at wrist and hand level, left hand +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  212. S66.919
    Strain of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  213. S66.92
    Laceration of unspecified muscle, fascia and tendon at wrist and hand level
    Header
  214. S66.921
    Laceration of unspecified muscle, fascia and tendon at wrist and hand level, right hand +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  215. S66.922
    Laceration of unspecified muscle, fascia and tendon at wrist and hand level, left hand +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  216. S66.929
    Laceration of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  217. S66.99
    Other injury of unspecified muscle, fascia and tendon at wrist and hand level
    Header
  218. S66.991
    Other injury of unspecified muscle, fascia and tendon at wrist and hand level, right hand +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  219. S66.992
    Other injury of unspecified muscle, fascia and tendon at wrist and hand level, left hand +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  220. S66.999
    Other injury of unspecified muscle, fascia and tendon at wrist and hand level, unspecified hand +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column. Rows marked +7th need a 7th character: pick one to build the full code; its code card has its own flags.

Instructions

At S66

Excludes2

  • sprain of joints and ligaments of wrist and hand (S63.-) S63

Code also

  • any associated open wound (S61.-) S61

Notes that also apply

Block S60-S69 instructions (Excludes2 3): printed on the block page.

Chapter 19 instructions (Notes 2, Excludes2 2, Use additional code 1): printed on the chapter 19 page.

7th characters

7th characters for S66 defined here

The appropriate 7th character is to be added to each code from category S66

7th characters for S66
7thMeaning (NCHS)
Ainitial encounter
Dsubsequent encounter
Ssequela

A code that takes a 7th character is invalid without it; the placeholder X fills a code shorter than 6 characters (Official Guidelines I.A.5). How 7th characters work.

Index entries

  • Injurymuscle (and fascia) (and tendon)hand (level) → S66.90-
  • Injurymuscle (and fascia) (and tendon)thumbintrinsic → S66.40-
  • Injurymuscle (and fascia) (and tendon)fingerintrinsic → S66.509
  • Injurymuscle (and fascia) (and tendon)hand (level)strain → S66.91-
  • Injurymuscle (and fascia) (and tendon)hand (level)laceration → S66.92-
  • Injurymuscle (and fascia) (and tendon)thumbflexor (forearm level)hand level → S66.00-
  • Injurymuscle (and fascia) (and tendon)fingerflexor (forearm level)hand level → S66.109
  • Injurymuscle (and fascia) (and tendon)thumbextensor (forearm level)hand level → S66.20-
  • Injurymuscle (and fascia) (and tendon)fingerextensor (forearm level)hand level → S66.309
  • Injurymuscle (and fascia) (and tendon)thumbintrinsicstrain → S66.41-
  • Injurymuscle (and fascia) (and tendon)thumbintrinsiclaceration → S66.42-
  • Injurymuscle (and fascia) (and tendon)thumbintrinsicspecified type NEC → S66.49-
  • Injurymuscle (and fascia) (and tendon)fingerindexintrinsic → S66.50-
  • Injurymuscle (and fascia) (and tendon)fingerlittleintrinsic → S66.50-
  • Injurymuscle (and fascia) (and tendon)fingermiddleintrinsic → S66.50-
  • Injurymuscle (and fascia) (and tendon)fingerringintrinsic → S66.50-
  • Injurymuscle (and fascia) (and tendon)fingerintrinsicstrain → S66.519
  • Injurymuscle (and fascia) (and tendon)fingerintrinsiclaceration → S66.529
  • Injurymuscle (and fascia) (and tendon)fingerintrinsicspecified type NEC → S66.599
  • Injurymuscle (and fascia) (and tendon)hand (level)specifiedsite NEC → S66.80-
  • Injurymuscle (and fascia) (and tendon)hand (level)specifiedtype NEC → S66.99-
  • Injurymuscle (and fascia) (and tendon)thumbflexor (forearm level)hand levelstrain → S66.01-
  • Injurymuscle (and fascia) (and tendon)thumbflexor (forearm level)hand levellaceration → S66.02-
  • Injurymuscle (and fascia) (and tendon)thumbflexor (forearm level)hand levelspecified type NEC → S66.09-
  • Injurymuscle (and fascia) (and tendon)fingerlittleflexor (forearm level)hand level → S66.10-
  • Injurymuscle (and fascia) (and tendon)fingermiddleflexor (forearm level)hand level → S66.10-
  • Injurymuscle (and fascia) (and tendon)fingerringflexor (forearm level)hand level → S66.10-
  • Injurymuscle (and fascia) (and tendon)fingerindexflexor (forearm level)hand level → S66.108
  • Injurymuscle (and fascia) (and tendon)fingerflexor (forearm level)hand levelstrain → S66.119
  • Injurymuscle (and fascia) (and tendon)fingerflexor (forearm level)hand levellaceration → S66.129
  • Injurymuscle (and fascia) (and tendon)fingerflexor (forearm level)hand levelspecified type NEC → S66.199
  • Injurymuscle (and fascia) (and tendon)thumbextensor (forearm level)hand levelstrain → S66.21-
  • Injurymuscle (and fascia) (and tendon)thumbextensor (forearm level)hand levellaceration → S66.22-
  • Injurymuscle (and fascia) (and tendon)thumbextensor (forearm level)hand levelspecified type NEC → S66.29-
  • Injurymuscle (and fascia) (and tendon)fingerlittleextensor (forearm level)hand level → S66.30-
  • Injurymuscle (and fascia) (and tendon)fingermiddleextensor (forearm level)hand level → S66.30-
  • Injurymuscle (and fascia) (and tendon)fingerringextensor (forearm level)hand level → S66.30-
  • Injurymuscle (and fascia) (and tendon)fingerindexextensor (forearm level)hand level → S66.308
  • Injurymuscle (and fascia) (and tendon)fingerextensor (forearm level)hand levelstrain → S66.319
  • Injurymuscle (and fascia) (and tendon)fingerextensor (forearm level)hand levellaceration → S66.329

40 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy