T21
Burn and corrosion of trunk
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 5 never code together
T21code
Excludes2 — not included here, but the patient may have both. Code both when documented.
7th character 3
A initial encounter
D subsequent encounter
S sequela
Instructional notes 4
T21code
Includes
- burns and corrosion of hip region
S00-T88chapter
Notes
- 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.
Use additional code
- code to identify any retained foreign body, if applicable (Z18.-)Z18.-
Index entries leading here filed at null
No alphabetic index entry points at this code.
Subordinate codes 8
T21.0 Burn of unspecified degree of trunk T21.1 Burn of first degree of trunk T21.2 Burn of second degree of trunk T21.3 Burn of third degree of trunk T21.4 Corrosion of unspecified degree of trunk T21.5 Corrosion of first degree of trunk T21.6 Corrosion of second degree of trunk T21.7 Corrosion of third degree of trunk
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.