DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

S20 Superficial injury of thorax

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

S20 is not billable. The category heads 294 billable codes in FY2027, grouped under 6 subdivisions. Its codes take a 7th character, so none is complete with fewer than 7 characters.

Index → code

  • Abrasionbreast → S20.11-
  • Abrasionsternal region → S20.319
  • Blister (nonthermal)breast → S20.12-

Where it sits

  1. Chapter 19 Injury, poisoning and certain other consequences of external causes (S00-T88)
  2. S20-S29 Injuries to the thorax (S20-S29)
  3. S20 Superficial injury of thorax
Billable codes
294
Subdivisions
6
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
42

Codes in S20

  1. S20.0
    Contusion of breast
    Header
  2. S20.00
    Contusion of breast, unspecified breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  3. S20.01
    Contusion of right breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  4. S20.02
    Contusion of left breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  5. S20.1
    Other and unspecified superficial injuries of breast
    Header
  6. S20.10
    Unspecified superficial injuries of breast
    Header
  7. S20.101
    Unspecified superficial injuries of breast, right breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  8. S20.102
    Unspecified superficial injuries of breast, left breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  9. S20.109
    Unspecified superficial injuries of breast, unspecified breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  10. S20.11
    Abrasion of breast
    Header
  11. S20.111
    Abrasion of breast, right breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  12. S20.112
    Abrasion of breast, left breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  13. S20.119
    Abrasion of breast, unspecified breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  14. S20.12
    Blister (nonthermal) of breast
    Header
  15. S20.121
    Blister (nonthermal) of breast, right breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  16. S20.122
    Blister (nonthermal) of breast, left breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  17. S20.129
    Blister (nonthermal) of breast, unspecified breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  18. S20.14
    External constriction of part of breast
    Header
  19. S20.141
    External constriction of part of breast, right breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  20. S20.142
    External constriction of part of breast, left breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  21. S20.149
    External constriction of part of breast, unspecified breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  22. S20.15
    Superficial foreign body of breast
    Header
    Inclusion terms 1

    Inclusion terms

    • Splinter in the breast
  23. S20.151
    Superficial foreign body of breast, right breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  24. S20.152
    Superficial foreign body of breast, left breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  25. S20.159
    Superficial foreign body of breast, unspecified breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  26. S20.16
    Insect bite (nonvenomous) of breast
    Header
  27. S20.161
    Insect bite (nonvenomous) of breast, right breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  28. S20.162
    Insect bite (nonvenomous) of breast, left breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  29. S20.169
    Insect bite (nonvenomous) of breast, unspecified breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  30. S20.17
    Other superficial bite of breast
    Header
    Excludes1 1

    Excludes1

    • open bite of breast (S21.05-) S21.05
  31. S20.171
    Other superficial bite of breast, right breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  32. S20.172
    Other superficial bite of breast, left breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  33. S20.179
    Other superficial bite of breast, unspecified breast +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  34. S20.2
    Contusion of thorax
    Header
  35. S20.20
    Contusion of thorax, unspecified +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  36. S20.21
    Contusion of front wall of thorax
    Header
  37. S20.211
    Contusion of right front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  38. S20.212
    Contusion of left front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  39. S20.213
    Contusion of bilateral front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  40. S20.214
    Contusion of middle front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  41. S20.219
    Contusion of unspecified front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  42. S20.22
    Contusion of back wall of thorax
    Header
  43. S20.221
    Contusion of right back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  44. S20.222
    Contusion of left back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  45. S20.223
    Contusion of bilateral back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  46. S20.224
    Contusion of middle back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  47. S20.229
    Contusion of unspecified back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  48. S20.3
    Other and unspecified superficial injuries of front wall of thorax
    Header
  49. S20.30
    Unspecified superficial injuries of front wall of thorax
    Header
  50. S20.301
    Unspecified superficial injuries of right front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  51. S20.302
    Unspecified superficial injuries of left front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  52. S20.303
    Unspecified superficial injuries of bilateral front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  53. S20.304
    Unspecified superficial injuries of middle front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  54. S20.309
    Unspecified superficial injuries of unspecified front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  55. S20.31
    Abrasion of front wall of thorax
    Header
  56. S20.311
    Abrasion of right front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  57. S20.312
    Abrasion of left front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  58. S20.313
    Abrasion of bilateral front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  59. S20.314
    Abrasion of middle front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  60. S20.319
    Abrasion of unspecified front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  61. S20.32
    Blister (nonthermal) of front wall of thorax
    Header
  62. S20.321
    Blister (nonthermal) of right front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  63. S20.322
    Blister (nonthermal) of left front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  64. S20.323
    Blister (nonthermal) of bilateral front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  65. S20.324
    Blister (nonthermal) of middle front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  66. S20.329
    Blister (nonthermal) of unspecified front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  67. S20.34
    External constriction of front wall of thorax
    Header
  68. S20.341
    External constriction of right front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  69. S20.342
    External constriction of left front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  70. S20.343
    External constriction of bilateral front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  71. S20.344
    External constriction of middle front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  72. S20.349
    External constriction of unspecified front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  73. S20.35
    Superficial foreign body of front wall of thorax
    Header
    Inclusion terms 1

    Inclusion terms

    • Splinter in front wall of thorax
  74. S20.351
    Superficial foreign body of right front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  75. S20.352
    Superficial foreign body of left front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  76. S20.353
    Superficial foreign body of bilateral front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  77. S20.354
    Superficial foreign body of middle front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  78. S20.359
    Superficial foreign body of unspecified front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  79. S20.36
    Insect bite (nonvenomous) of front wall of thorax
    Header
  80. S20.361
    Insect bite (nonvenomous) of right front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  81. S20.362
    Insect bite (nonvenomous) of left front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  82. S20.363
    Insect bite (nonvenomous) of bilateral front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  83. S20.364
    Insect bite (nonvenomous) of middle front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  84. S20.369
    Insect bite (nonvenomous) of unspecified front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  85. S20.37
    Other superficial bite of front wall of thorax
    Header
    Excludes1 1

    Excludes1

    • open bite of front wall of thorax (S21.14) S21.14
  86. S20.371
    Other superficial bite of right front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  87. S20.372
    Other superficial bite of left front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  88. S20.373
    Other superficial bite of bilateral front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  89. S20.374
    Other superficial bite of middle front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  90. S20.379
    Other superficial bite of unspecified front wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  91. S20.4
    Other and unspecified superficial injuries of back wall of thorax
    Header
  92. S20.40
    Unspecified superficial injuries of back wall of thorax
    Header
  93. S20.401
    Unspecified superficial injuries of right back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  94. S20.402
    Unspecified superficial injuries of left back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  95. S20.409
    Unspecified superficial injuries of unspecified back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  96. S20.41
    Abrasion of back wall of thorax
    Header
  97. S20.411
    Abrasion of right back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  98. S20.412
    Abrasion of left back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  99. S20.419
    Abrasion of unspecified back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  100. S20.42
    Blister (nonthermal) of back wall of thorax
    Header
  101. S20.421
    Blister (nonthermal) of right back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  102. S20.422
    Blister (nonthermal) of left back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  103. S20.429
    Blister (nonthermal) of unspecified back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  104. S20.44
    External constriction of back wall of thorax
    Header
  105. S20.441
    External constriction of right back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  106. S20.442
    External constriction of left back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  107. S20.449
    External constriction of unspecified back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  108. S20.45
    Superficial foreign body of back wall of thorax
    Header
    Inclusion terms 1

    Inclusion terms

    • Splinter of back wall of thorax
  109. S20.451
    Superficial foreign body of right back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  110. S20.452
    Superficial foreign body of left back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  111. S20.459
    Superficial foreign body of unspecified back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  112. S20.46
    Insect bite (nonvenomous) of back wall of thorax
    Header
  113. S20.461
    Insect bite (nonvenomous) of right back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  114. S20.462
    Insect bite (nonvenomous) of left back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  115. S20.469
    Insect bite (nonvenomous) of unspecified back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  116. S20.47
    Other superficial bite of back wall of thorax
    Header
    Excludes1 1

    Excludes1

    • open bite of back wall of thorax (S21.24) S21.24
  117. S20.471
    Other superficial bite of right back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  118. S20.472
    Other superficial bite of left back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  119. S20.479
    Other superficial bite of unspecified back wall of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  120. S20.9
    Superficial injury of unspecified parts of thorax
    Header
    Excludes1 1

    Excludes1

    • contusion of thorax NOS (S20.20) S20.20
  121. S20.90
    Unspecified superficial injury of unspecified parts of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Superficial injury of thoracic wall NOS
  122. S20.91
    Abrasion of unspecified parts of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  123. S20.92
    Blister (nonthermal) of unspecified parts of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  124. S20.94
    External constriction of unspecified parts of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  125. S20.95
    Superficial foreign body of unspecified parts of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Inclusion terms 1

    Inclusion terms

    • Splinter in thorax NOS
  126. S20.96
    Insect bite (nonvenomous) of unspecified parts of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  127. S20.97
    Other superficial bite of unspecified parts of thorax +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Excludes1 1

    Excludes1

    • open bite of thorax NOS (S21.95) S21.95

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

Notes that also apply

Block S20-S29 instructions (Includes 3, Excludes2 11): 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 S20 defined here

The appropriate 7th character is to be added to each code from category S20

7th characters for S20
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

  • Contusion (skin surface intact)breast → S20.0-
  • Abrasionbreast → S20.11-
  • Blister (nonthermal)breast → S20.12-
  • Contusion (skin surface intact)thorax (wall) → S20.20
  • Contusion (skin surface intact)sternal region → S20.219
  • Contusion (skin surface intact)interscapular region → S20.229
  • Abrasionsternal region → S20.319
  • Blister (nonthermal)sternal region → S20.329
  • Abrasioninterscapular region → S20.419
  • Blister (nonthermal)interscapular region → S20.429
  • Abrasionthorax, thoracic (wall) → S20.91
  • Blister (nonthermal)thorax, thoracic (wall) → S20.92
  • Injurysuperficial NECbreast → S20.10-
  • Constrictionexternalbreast → S20.14-
  • Foreign bodysuperficial, without open woundbreast → S20.15-
  • Bite(s) (animal) (human)breastsuperficial NEC → S20.17-
  • Contusion (skin surface intact)thorax (wall)front → S20.21-
  • Contusion (skin surface intact)thorax (wall)back → S20.22-
  • Abrasionthorax, thoracic (wall)front → S20.31-
  • Blister (nonthermal)thorax, thoracic (wall)front → S20.32-
  • Constrictionexternalsternal region → S20.349
  • Foreign bodysuperficial, without open woundsternal region → S20.359
  • Abrasionthorax, thoracic (wall)back → S20.41-
  • Blister (nonthermal)thorax, thoracic (wall)back → S20.42-
  • Constrictionexternalinterscapular region → S20.449
  • Foreign bodysuperficial, without open woundinterscapular region → S20.459
  • Injurysuperficial NECthorax, thoracic (wall) → S20.90
  • Constrictionexternalthorax, thoracic (wall) → S20.94
  • Foreign bodysuperficial, without open woundthorax, thoracic (wall) → S20.95
  • Bite(s) (animal) (human)thorax, thoracic (wall)superficial NEC → S20.97
  • Bite(s) (animal) (human)breastsuperficial NECinsect → S20.16-
  • Injurysuperficial NECthorax, thoracic (wall)front → S20.30-
  • Constrictionexternalthorax, thoracic (wall)front → S20.34-
  • Foreign bodysuperficial, without open woundthorax, thoracic (wall)front → S20.35-
  • Bite(s) (animal) (human)thorax, thoracic (wall)superficial NECfront → S20.37-
  • Injurysuperficial NECthorax, thoracic (wall)back → S20.40-
  • Constrictionexternalthorax, thoracic (wall)back → S20.44-
  • Foreign bodysuperficial, without open woundthorax, thoracic (wall)back → S20.45-
  • Bite(s) (animal) (human)thorax, thoracic (wall)superficial NECback → S20.47-
  • Bite(s) (animal) (human)thorax, thoracic (wall)superficial NECinsect → S20.96

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

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

Hierarchy