T21.49
Corrosion of unspecified degree of other site of trunk
Not billable — category only FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 8 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
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 6
T21.4code
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 1
Alongside this code 8 same parent — T21.4
T21.40 Corrosion of unspecified degree of trunk, unspecified site category T21.41 Corrosion of unspecified degree of chest wall category T21.42 Corrosion of unspecified degree of abdominal wall category T21.43 Corrosion of unspecified degree of upper back category T21.44 Corrosion of unspecified degree of lower back category T21.45 Corrosion of unspecified degree of buttock category T21.46 Corrosion of unspecified degree of male genital region category T21.47 Corrosion of unspecified degree of female genital region category
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.