T24.401A — Corrosion of unspecified degree of unspecified site of right lower limb, except ankle and foot, initial encounter
Is T24.401A billable?
Yes, but T24.401A is an unspecified code. T24.401A is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, T24.401A is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting T24.401A — the more specific alternatives are listed below.
More specific alternatives
- T24.101ABurn of first degree of unspecified site of right lower limb, except ankle and foot, initial encounter
- T24.201ABurn of second degree of unspecified site of right lower limb, except ankle and foot, initial encounter
- T24.301ABurn of third degree of unspecified site of right lower limb, except ankle and foot, initial encounter
- T24.501ACorrosion of first degree of unspecified site of right lower limb, except ankle and foot, initial encounter
- T24.601ACorrosion of second degree of unspecified site of right lower limb, except ankle and foot, initial encounter
- T24.701ACorrosion of third degree of unspecified site of right lower limb, except ankle and foot, initial encounter
T24.401A at a glance
| Code | T24.401A |
|---|---|
| Description | Corrosion of unspecified degree of unspecified site of right lower limb, except ankle and foot, initial encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "A" | initial encounter |
What does the 7th character "A" mean in T24.401A?
In T24.401A, the 7th character A means initial encounter. The 7th character is required for T24.401A to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T24.401A group to?
T24.401A sits in MDC 22 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 935Non-Extensive Burnsmedical
How is T24.401A listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T24.401, the nearest indexed parent of T24.401A. Use them to find the family, then select the specific code.
- Corrosion › lower › limb › right (injury) (acid) (caustic) (chemical) (lime) (external) (internal)
Code first — inherited from T24.4
The underlying condition below must be sequenced before T24.401A. T24.401A 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 T24.401A to fully describe the condition. T24.401A 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 T24.401A to fully describe the condition. T24.401A is sequenced first.
Use additional code — inherited from T24.4
Report an additional code alongside T24.401A to fully describe the condition. T24.401A 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 T24.401A, but a patient may have both at the same time. When documentation supports it, T24.401A and the excluded code may both be reported.
Excludes2 — not included here — inherited from T24
The conditions below are not part of T24.401A, but a patient may have both at the same time. When documentation supports it, T24.401A and the excluded code may both be reported.
How long has T24.401A existed?
T24.401A 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.