T21.3
Burn of third degree of trunk
Choose the additional character
T21.3 needs more characters to be billable. Pick the specific code below.
- T21.30Burn of third degree of trunk, unspecified siteMore levels
- T21.31Burn of third degree of chest wallMore levels
- T21.32Burn of third degree of abdominal wallMore levels
- T21.33Burn of third degree of upper backMore levels
- T21.34Burn of third degree of lower backMore levels
- T21.35Burn of third degree of buttockMore levels
- T21.36Burn of third degree of male genital regionMore levels
- T21.37Burn of third degree of female genital regionMore levels
- T21.39Burn of third degree of other site of trunkMore levels
This code does not map to a risk-adjusting HCC in the loaded models.
Coding notes
Excludes 1 never coded together · Excludes 2 may co-exist
burns and corrosion of hip region
burns and corrosion of axilla (T22.- with fifth character 4) burns and corrosion of scapular region (T22.- with fifth character 6) burns and corrosion of shoulder (T22.- with fifth character 5)
The appropriate 7th character is to be added to each code from category T21
| Character | Meaning |
|---|---|
| A | initial encounter |
| D | subsequent encounter |
| S | sequela |
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]
code to identify any retained foreign body, if applicable (Z18.-)
Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes. (T07-T88) Injury, poisoning and certain other consequences of external causes (T07-T88) (T20-T32) Burns and corrosions (T20-T32) Includes: burns (thermal) from electrical heating appliances burns (thermal) from electricity burns (thermal) from flame burns (thermal) from friction burns (thermal) from hot air and hot gases burns (thermal) from hot objects burns (thermal) from lightning burns (thermal) from radiation chemical burn [corrosion] (external) (internal) scalds Excludes2: erythema [dermatitis] ab igne (L59.0) radiation-related disorders of the skin and subcutaneous tissue (L55-L59) sunburn (L55.-)
Official Guidelines for T21.3
FY 2026 ›Subsections
- I.C.19.aApplication of 7th Characters in Chapter 19
- I.C.19.bCoding of Injuries
- I.C.19.cCoding of Traumatic Fractures
- I.C.19.dCoding of Burns and Corrosions
- I.C.19.eAdverse Effects, Poisoning, Underdosing and Toxic Effects
- I.C.19.fAdult and child abuse, neglect and other maltreatment
- I.C.19.gComplications of care
Sections that reference T21.3
Sections whose FY 2026 text names T21.3, its T21 category, or a range containing it — the chapter guidance above is the authoritative source.