DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

T26 Burn and corrosion confined to eye and adnexa

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

T26 is not billable. The category heads 90 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)eyelid(s) → T26.5-
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)eye(s) and adnexa → T26.9-
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)eyelid(s) → T26.0-

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. T26 Burn and corrosion confined to eye and adnexa
Billable codes
90
Subdivisions
10
CC / MCC codes
6 / 0
HCC V28 codes
0
New FY2027
0
Index entries
10

Codes in T26

  1. T26.0
    Burn of eyelid and periocular area
    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. T26.00
    Burn of unspecified eyelid and periocular area +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  3. T26.01
    Burn of right eyelid and periocular area +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  4. T26.02
    Burn of left eyelid and periocular area +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  5. T26.1
    Burn of cornea and conjunctival sac
    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
  6. T26.10
    Burn of cornea and conjunctival sac, unspecified eye +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  7. T26.11
    Burn of cornea and conjunctival sac, right eye +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  8. T26.12
    Burn of cornea and conjunctival sac, left eye +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  9. T26.2
    Burn with resulting rupture and destruction of eyeball
    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
  10. T26.20
    Burn with resulting rupture and destruction of unspecified eyeball +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  11. T26.21
    Burn with resulting rupture and destruction of right eyeball +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  12. T26.22
    Burn with resulting rupture and destruction of left eyeball +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  13. T26.3
    Burns of other specified parts of eye and adnexa
    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
  14. T26.30
    Burns of other specified parts of unspecified eye and adnexa +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  15. T26.31
    Burns of other specified parts of right eye and adnexa +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  16. T26.32
    Burns of other specified parts of left eye and adnexa +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  17. T26.4
    Burn of eye and adnexa, part unspecified
    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
  18. T26.40
    Burn of unspecified eye and adnexa, part unspecified +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  19. T26.41
    Burn of right eye and adnexa, part unspecified +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  20. T26.42
    Burn of left eye and adnexa, part unspecified +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  21. T26.5
    Corrosion of eyelid and periocular area
    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
  22. T26.50
    Corrosion of unspecified eyelid and periocular area +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  23. T26.51
    Corrosion of right eyelid and periocular area +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  24. T26.52
    Corrosion of left eyelid and periocular area +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  25. T26.6
    Corrosion of cornea and conjunctival sac
    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
  26. T26.60
    Corrosion of cornea and conjunctival sac, unspecified eye +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  27. T26.61
    Corrosion of cornea and conjunctival sac, right eye +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  28. T26.62
    Corrosion of cornea and conjunctival sac, left eye +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  29. T26.7
    Corrosion with resulting rupture and destruction of eyeball
    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
  30. T26.70
    Corrosion with resulting rupture and destruction of unspecified eyeball +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  31. T26.71
    Corrosion with resulting rupture and destruction of right eyeball +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  32. T26.72
    Corrosion with resulting rupture and destruction of left eyeball +7th: A D S
    Needs 7th characterCC AExempt: 2 of 3 7th characters
  33. T26.8
    Corrosions of other specified parts of eye and adnexa
    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
  34. T26.80
    Corrosions of other specified parts of unspecified eye and adnexa +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  35. T26.81
    Corrosions of other specified parts of right eye and adnexa +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  36. T26.82
    Corrosions of other specified parts of left eye and adnexa +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  37. T26.9
    Corrosion of eye and adnexa, part unspecified
    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
  38. T26.90
    Corrosion of unspecified eye and adnexa, part unspecified +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  39. T26.91
    Corrosion of right eye and adnexa, part unspecified +7th: A D S
    Needs 7th characterExempt: 2 of 3 7th characters
  40. T26.92
    Corrosion of left eye and adnexa, part unspecified +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

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 T26 defined here

The appropriate 7th character is to be added to each code from category T26

7th characters for T26
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)eyelid(s) → T26.0-
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)cornea (and conjunctiva) → T26.1-
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)eye(s) and adnexa → T26.4-
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)eyelid(s) → T26.5-
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)cornea (and conjunctiva) → T26.6-
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)eye(s) and adnexa → T26.9-
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)eye(s) and adnexawith resulting rupture and destruction of eyeball → T26.2-
  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal)eye(s) and adnexaspecified site NEC → T26.3-
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)eye(s) and adnexawith resulting rupture and destruction of eyeball → T26.7-
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)eye(s) and adnexaspecified site NEC → T26.8-

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

Hierarchy