DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Block · Chapter 19

T20-T25 Burns and corrosions of external body surface, specified by site (T20-T25)

Block T20-T25 groups 6 categories with 2,304 billable codes in FY2027.

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)

Neighbouring blocks

Categories
6
Billable codes
2,304
CC codes
192
MCC codes
0
HCC V28 codes
0
New FY2027
0

Categories in T20-T25

  • T20

    Burn and corrosion of head, face, and neck

    Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)chin → T20.43

    • 264 billable codes
    • 22 CC
  • T21

    Burn and corrosion of trunk

    Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)trunk → T21.40

    • 216 billable codes
    • 18 CC
  • T22

    Burn and corrosion of shoulder and upper limb, except wrist and hand

    Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)elbow → T22.429

    • 528 billable codes
    • 44 CC
  • T23

    Burn and corrosion of wrist and hand

    Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)palm → T23.459

    • 648 billable codes
    • 54 CC
  • T24

    Burn and corrosion of lower limb, except ankle and foot

    Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)calf → T24.439

    • 360 billable codes
    • 30 CC
  • T25

    Burn and corrosion of ankle and foot

    Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal)toe → T25.439

    • 288 billable codes
    • 24 CC

Index main terms

  • Burn (electricity) (flame) (hot gas, liquid or hot object) (radiation) (steam) (thermal) → T20, T21, T22, T23, T24, T25 (404 entries)
  • Corrosion (injury) (acid) (caustic) (chemical) (lime) (external) (internal) → T20, T21, T22, T23, T24, T25 (404 entries)

Block instructions

Includes

  • burns and corrosions of first degree [erythema]
  • burns and corrosions of second degree [blisters][epidermal loss]
  • burns and corrosions of third degree [deep necrosis of underlying tissue] [full- thickness skin loss]

Use additional code

  • code from category T31 or T32 to identify extent of body surface involved T31 T32

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.