DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

T28 Burn and corrosion of other internal organs

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

T28 is not billable. The category heads 54 billable codes in FY2027, grouped under 10 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)colon → T28.7
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)mouth → T28.5
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)cervix → T28.8

Where it sits

  1. Chapter 19 Injury, poisoning and certain other consequences of external causes (S00-T88)
  2. T26-T28 Burns and corrosions confined to eye and internal organs (T26-T28)
  3. T28 Burn and corrosion of other internal organs
Billable codes
54
Subdivisions
10
CC / MCC codes
4 / 0
HCC V28 codes
0
New FY2027
0
Index entries
56

Codes in T28

  1. T28.0
    Burn of mouth and pharynx +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  2. T28.1
    Burn of esophagus +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  3. T28.2
    Burn of other parts of alimentary tract +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  4. T28.3
    Burn of internal genitourinary organs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  5. T28.4
    Burns of other and unspecified internal organs
    Header
  6. T28.40
    Burn of unspecified internal organ +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  7. T28.41
    Burn of ear drum
    Header
  8. T28.411
    Burn of right ear drum +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  9. T28.412
    Burn of left ear drum +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  10. T28.419
    Burn of unspecified ear drum +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  11. T28.49
    Burn of other internal organ +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  12. T28.5
    Corrosion of mouth and pharynx +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Code first 1

    Code first

    • (T51-T65) to identify chemical and intent T51 T65
  13. T28.6
    Corrosion of esophagus +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
    Code first 1

    Code first

    • (T51-T65) to identify chemical and intent T51 T65
  14. T28.7
    Corrosion of other parts of alimentary tract +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
    Code first 1

    Code first

    • (T51-T65) to identify chemical and intent T51 T65
  15. T28.8
    Corrosion of internal genitourinary organs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
    Code first 1

    Code first

    • (T51-T65) to identify chemical and intent T51 T65
  16. T28.9
    Corrosions of other and unspecified internal organs
    Header
    Code first 1

    Code first

    • (T51-T65) to identify chemical and intent T51 T65
  17. T28.90
    Corrosions of unspecified internal organs +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  18. T28.91
    Corrosions of ear drum
    Header
  19. T28.911
    Corrosions of right ear drum +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  20. T28.912
    Corrosions of left ear drum +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  21. T28.919
    Corrosions of unspecified ear drum +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  22. T28.99
    Corrosions of other internal organs +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 T28

Use additional code

  • external cause code to identify the source and intent of the burn (X00-X19, X75-X77, X96-X98) X00 X19 X75 X77 X96 X98
  • external cause code to identify place (Y92) Y92

Notes that also apply

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 T28 defined here

The appropriate 7th character is to be added to each code from category T28

7th characters for T28
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)mouth → T28.0
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)pharynx → T28.0
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)throat (meaning pharynx) → T28.0
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)tongue → T28.0
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)tonsil(s) → T28.0
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)esophagus → T28.1
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)alimentary tract NEC → T28.2
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)colon → T28.2
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)gastrointestinal tract NEC → T28.2
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)intestine (large) (small) → T28.2
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)rectum → T28.2
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)stomach → T28.2
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)cervix → T28.3
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)uterus → T28.3
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)vagina → T28.3
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)internal organ(s) → T28.40
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)mouth → T28.5
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)pharynx → T28.5
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)throat (meaning pharynx) → T28.5
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)tongue → T28.5
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)tonsil(s) → T28.5
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)esophagus → T28.6
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)alimentary tract NEC → T28.7
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)colon → T28.7
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)gastrointestinal tract NEC → T28.7
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)intestine (large) (small) → T28.7
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)rectum → T28.7
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)stomach → T28.7
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)cervix → T28.8
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)uterus → T28.8
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)vagina → T28.8
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)internal organ(s) → T28.90
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)alimentary tract NECmouth → T28.0
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)alimentary tract NECpharynx → T28.0
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)internal organ(s)mouth → T28.0
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)internal organ(s)pharynx → T28.0
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)alimentary tract NECesophagus → T28.1
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)internal organ(s)esophagus → T28.1
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)internal organ(s)alimentary tract → T28.2
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)genital organsinternal → T28.3

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

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

Hierarchy