T25.49 — Corrosion of unspecified degree of multiple sites of ankle and foot
Is T25.49 billable?
No — T25.49 is a non-billable header code. T25.49 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 9 billable codes beneath T25.49.
Billable codes under this header
- T25.491ACorrosion of unspecified degree of multiple sites of right ankle and foot, initial encounter
- T25.491DCorrosion of unspecified degree of multiple sites of right ankle and foot, subsequent encounter
- T25.491SCorrosion of unspecified degree of multiple sites of right ankle and foot, sequela
- T25.492ACorrosion of unspecified degree of multiple sites of left ankle and foot, initial encounter
- T25.492DCorrosion of unspecified degree of multiple sites of left ankle and foot, subsequent encounter
- T25.492SCorrosion of unspecified degree of multiple sites of left ankle and foot, sequela
- T25.499ACorrosion of unspecified degree of multiple sites of unspecified ankle and foot, initial encounter
- T25.499DCorrosion of unspecified degree of multiple sites of unspecified ankle and foot, subsequent encounter
- T25.499SCorrosion of unspecified degree of multiple sites of unspecified ankle and foot, sequela
T25.49 at a glance
| Code | T25.49 |
|---|---|
| Description | Corrosion of unspecified degree of multiple sites of ankle and foot |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Code first — inherited from T25.4
The underlying condition below must be sequenced before T25.49. T25.49 describes a manifestation and cannot be the principal or first-listed diagnosis.
- (T51-T65) to identify chemical and intent
Use additional code — inherited from Chapter 19
Report an additional code alongside T25.49 to fully describe the condition. T25.49 is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Use additional code — inherited from T20-T25
Report an additional code alongside T25.49 to fully describe the condition. T25.49 is sequenced first.
Use additional code — inherited from T25.4
Report an additional code alongside T25.49 to fully describe the condition. T25.49 is sequenced first.
- external cause code to identify place (Y92)
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T25.49, but a patient may have both at the same time. When documentation supports it, T25.49 and the excluded code may both be reported.
What codes fall under T25.49? (3)
How long has T25.49 existed?
T25.49 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.