DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

T20 Burn and corrosion of head, face, and neck

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

T20 is not billable. The category heads 264 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

  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)chin → T20.43
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)neck → T20.47
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)cheek → T20.46

Where it sits

  1. Chapter 19 Injury, poisoning and certain other consequences of external causes (S00-T88)
  2. T20-T25 Burns and corrosions of external body surface, specified by site (T20-T25)
  3. T20 Burn and corrosion of head, face, and neck
Billable codes
264
Subdivisions
8
CC / MCC codes
22 / 0
HCC V28 codes
0
New FY2027
0
Index entries
80

Codes in T20

  1. T20.0
    Burn of unspecified degree of head, face, and neck
    Header
    Use additional code 1

    Use additional code

    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92) X00 X19 X75 X77 X96 X98 Y92
  2. T20.00
    Burn of unspecified degree of head, face, and neck, unspecified site +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  3. T20.01
    Burn of unspecified degree of ear [any part, except ear drum]
    Header
    Excludes2 1

    Excludes2

    • burn of ear drum (T28.41-) T28.41
  4. T20.011
    Burn of unspecified degree of right ear [any part, except ear drum] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  5. T20.012
    Burn of unspecified degree of left ear [any part, except ear drum] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  6. T20.019
    Burn of unspecified degree of unspecified ear [any part, except ear drum] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  7. T20.02
    Burn of unspecified degree of lip(s) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  8. T20.03
    Burn of unspecified degree of chin +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  9. T20.04
    Burn of unspecified degree of nose (septum) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  10. T20.05
    Burn of unspecified degree of scalp [any part] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  11. T20.06
    Burn of unspecified degree of forehead and cheek +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  12. T20.07
    Burn of unspecified degree of neck +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  13. T20.09
    Burn of unspecified degree of multiple sites of head, face, and neck +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  14. T20.1
    Burn of first degree of head, face, and neck
    Header
    Use additional code 1

    Use additional code

    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92) X00 X19 X75 X77 X96 X98 Y92
  15. T20.10
    Burn of first degree of head, face, and neck, unspecified site +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  16. T20.11
    Burn of first degree of ear [any part, except ear drum]
    Header
    Excludes2 1

    Excludes2

    • burn of ear drum (T28.41-) T28.41
  17. T20.111
    Burn of first degree of right ear [any part, except ear drum] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  18. T20.112
    Burn of first degree of left ear [any part, except ear drum] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  19. T20.119
    Burn of first degree of unspecified ear [any part, except ear drum] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  20. T20.12
    Burn of first degree of lip(s) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  21. T20.13
    Burn of first degree of chin +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  22. T20.14
    Burn of first degree of nose (septum) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  23. T20.15
    Burn of first degree of scalp [any part] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  24. T20.16
    Burn of first degree of forehead and cheek +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  25. T20.17
    Burn of first degree of neck +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  26. T20.19
    Burn of first degree of multiple sites of head, face, and neck +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  27. T20.2
    Burn of second degree of head, face, and neck
    Header
    Use additional code 1

    Use additional code

    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92) X00 X19 X75 X77 X96 X98 Y92
  28. T20.20
    Burn of second degree of head, face, and neck, unspecified site +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  29. T20.21
    Burn of second degree of ear [any part, except ear drum]
    Header
    Excludes2 1

    Excludes2

    • burn of ear drum (T28.41-) T28.41
  30. T20.211
    Burn of second degree of right ear [any part, except ear drum] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  31. T20.212
    Burn of second degree of left ear [any part, except ear drum] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  32. T20.219
    Burn of second degree of unspecified ear [any part, except ear drum] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  33. T20.22
    Burn of second degree of lip(s) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  34. T20.23
    Burn of second degree of chin +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  35. T20.24
    Burn of second degree of nose (septum) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  36. T20.25
    Burn of second degree of scalp [any part] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  37. T20.26
    Burn of second degree of forehead and cheek +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  38. T20.27
    Burn of second degree of neck +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  39. T20.29
    Burn of second degree of multiple sites of head, face, and neck +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  40. T20.3
    Burn of third degree of head, face, and neck
    Header
    Use additional code 1

    Use additional code

    • external cause code to identify the source, place and intent of the burn (X00-X19, X75-X77, X96-X98, Y92) X00 X19 X75 X77 X96 X98 Y92
  41. T20.30
    Burn of third degree of head, face, and neck, unspecified site +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  42. T20.31
    Burn of third degree of ear [any part, except ear drum]
    Header
    Excludes2 1

    Excludes2

    • burn of ear drum (T28.41-) T28.41
  43. T20.311
    Burn of third degree of right ear [any part, except ear drum] +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  44. T20.312
    Burn of third degree of left ear [any part, except ear drum] +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  45. T20.319
    Burn of third degree of unspecified ear [any part, except ear drum] +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  46. T20.32
    Burn of third degree of lip(s) +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  47. T20.33
    Burn of third degree of chin +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  48. T20.34
    Burn of third degree of nose (septum) +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  49. T20.35
    Burn of third degree of scalp [any part] +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  50. T20.36
    Burn of third degree of forehead and cheek +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  51. T20.37
    Burn of third degree of neck +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  52. T20.39
    Burn of third degree of multiple sites of head, face, and neck +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  53. T20.4
    Corrosion of unspecified degree of head, face, and neck
    Header
    Code first 1, Use additional code 1

    Code first

    • (T51-T65) to identify chemical and intent T51 T65

    Use additional code

    • external cause code to identify place (Y92) Y92
  54. T20.40
    Corrosion of unspecified degree of head, face, and neck, unspecified site +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  55. T20.41
    Corrosion of unspecified degree of ear [any part, except ear drum]
    Header
    Excludes2 1

    Excludes2

    • corrosion of ear drum (T28.91-) T28.91
  56. T20.411
    Corrosion of unspecified degree of right ear [any part, except ear drum] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  57. T20.412
    Corrosion of unspecified degree of left ear [any part, except ear drum] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  58. T20.419
    Corrosion of unspecified degree of unspecified ear [any part, except ear drum] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  59. T20.42
    Corrosion of unspecified degree of lip(s) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  60. T20.43
    Corrosion of unspecified degree of chin +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  61. T20.44
    Corrosion of unspecified degree of nose (septum) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  62. T20.45
    Corrosion of unspecified degree of scalp [any part] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  63. T20.46
    Corrosion of unspecified degree of forehead and cheek +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  64. T20.47
    Corrosion of unspecified degree of neck +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  65. T20.49
    Corrosion of unspecified degree of multiple sites of head, face, and neck +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  66. T20.5
    Corrosion of first degree of head, face, and neck
    Header
    Code first 1, Use additional code 1

    Code first

    • (T51-T65) to identify chemical and intent T51 T65

    Use additional code

    • external cause code to identify place (Y92) Y92
  67. T20.50
    Corrosion of first degree of head, face, and neck, unspecified site +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  68. T20.51
    Corrosion of first degree of ear [any part, except ear drum]
    Header
    Excludes2 1

    Excludes2

    • corrosion of ear drum (T28.91-) T28.91
  69. T20.511
    Corrosion of first degree of right ear [any part, except ear drum] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  70. T20.512
    Corrosion of first degree of left ear [any part, except ear drum] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  71. T20.519
    Corrosion of first degree of unspecified ear [any part, except ear drum] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  72. T20.52
    Corrosion of first degree of lip(s) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  73. T20.53
    Corrosion of first degree of chin +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  74. T20.54
    Corrosion of first degree of nose (septum) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  75. T20.55
    Corrosion of first degree of scalp [any part] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  76. T20.56
    Corrosion of first degree of forehead and cheek +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  77. T20.57
    Corrosion of first degree of neck +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  78. T20.59
    Corrosion of first degree of multiple sites of head, face, and neck +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  79. T20.6
    Corrosion of second degree of head, face, and neck
    Header
    Code first 1, Use additional code 1

    Code first

    • (T51-T65) to identify chemical and intent T51 T65

    Use additional code

    • external cause code to identify place (Y92) Y92
  80. T20.60
    Corrosion of second degree of head, face, and neck, unspecified site +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  81. T20.61
    Corrosion of second degree of ear [any part, except ear drum]
    Header
    Excludes2 1

    Excludes2

    • corrosion of ear drum (T28.91-) T28.91
  82. T20.611
    Corrosion of second degree of right ear [any part, except ear drum] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  83. T20.612
    Corrosion of second degree of left ear [any part, except ear drum] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  84. T20.619
    Corrosion of second degree of unspecified ear [any part, except ear drum] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  85. T20.62
    Corrosion of second degree of lip(s) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  86. T20.63
    Corrosion of second degree of chin +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  87. T20.64
    Corrosion of second degree of nose (septum) +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  88. T20.65
    Corrosion of second degree of scalp [any part] +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  89. T20.66
    Corrosion of second degree of forehead and cheek +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  90. T20.67
    Corrosion of second degree of neck +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  91. T20.69
    Corrosion of second degree of multiple sites of head, face, and neck +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  92. T20.7
    Corrosion of third degree of head, face, and neck
    Header
    Code first 1, Use additional code 1

    Code first

    • (T51-T65) to identify chemical and intent T51 T65

    Use additional code

    • external cause code to identify place (Y92) Y92
  93. T20.70
    Corrosion of third degree of head, face, and neck, unspecified site +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  94. T20.71
    Corrosion of third degree of ear [any part, except ear drum]
    Header
    Excludes2 1

    Excludes2

    • corrosion of ear drum (T28.91-) T28.91
  95. T20.711
    Corrosion of third degree of right ear [any part, except ear drum] +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  96. T20.712
    Corrosion of third degree of left ear [any part, except ear drum] +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  97. T20.719
    Corrosion of third degree of unspecified ear [any part, except ear drum] +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  98. T20.72
    Corrosion of third degree of lip(s) +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  99. T20.73
    Corrosion of third degree of chin +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  100. T20.74
    Corrosion of third degree of nose (septum) +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  101. T20.75
    Corrosion of third degree of scalp [any part] +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  102. T20.76
    Corrosion of third degree of forehead and cheek +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  103. T20.77
    Corrosion of third degree of neck +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  104. T20.79
    Corrosion of third degree of multiple sites of head, face, and neck +7th: A D S
    Needs 7th characterCC AExempt: 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 T20

Excludes2

  • burn and corrosion of ear drum (T28.41, T28.91) T28.41 T28.91
  • burn and corrosion of eye and adnexa (T26.-) T26
  • burn and corrosion of mouth and pharynx (T28.0) T28.0

Notes that also apply

Block T20-T25 instructions (Includes 3, Use additional code 1): printed on the block page.

Instructions for the group T20-T32 (Includes 10, Excludes2 3): printed on the chapter 19 page.

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

7th characters

7th characters for T20 defined here

The appropriate 7th character is to be added to each code from category T20

7th characters for T20
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

  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)head (and face) (and neck) → T20.00
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)ear (auricle) (external) (canal) → T20.01
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)lip(s) → T20.02
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)chin → T20.03
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)nose (septum) → T20.04
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)scalp → T20.05
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)cheek → T20.06
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)forehead → T20.06
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)neck → T20.07
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)head (and face) (and neck) → T20.40
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)ear (auricle) (external) (canal) → T20.41
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)lip(s) → T20.42
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)chin → T20.43
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)nose (septum) → T20.44
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)scalp → T20.45
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)cheek → T20.46
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)forehead → T20.46
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)neck → T20.47
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)head (and face) (and neck)multiple sites → T20.09
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)head (and face) (and neck)first degree → T20.10
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)ear (auricle) (external) (canal)first degree → T20.11
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)lip(s)first degree → T20.12
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)chinfirst degree → T20.13
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)nose (septum)first degree → T20.14
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)scalpfirst degree → T20.15
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)cheekfirst degree → T20.16
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)foreheadfirst degree → T20.16
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)neckfirst degree → T20.17
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)head (and face) (and neck)second degree → T20.20
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)ear (auricle) (external) (canal)second degree → T20.21
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)lip(s)second degree → T20.22
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)chinsecond degree → T20.23
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)nose (septum)second degree → T20.24
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)scalpsecond degree → T20.25
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)cheeksecond degree → T20.26
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)foreheadsecond degree → T20.26
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)necksecond degree → T20.27
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)head (and face) (and neck)third degree → T20.30
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)ear (auricle) (external) (canal)third degree → T20.31
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)lip(s)third degree → T20.32

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

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

Hierarchy