T24.591 — Corrosion of first degree of multiple sites of right lower limb, except ankle and foot
Is T24.591 billable?
No — T24.591 is a non-billable header code. T24.591 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 3 billable codes beneath T24.591.
Billable codes under this header
- T24.591ACorrosion of first degree of multiple sites of right lower limb, except ankle and foot, initial encounter
- T24.591DCorrosion of first degree of multiple sites of right lower limb, except ankle and foot, subsequent encounter
- T24.591SCorrosion of first degree of multiple sites of right lower limb, except ankle and foot, sequela
T24.591 at a glance
| Code | T24.591 |
|---|---|
| Description | Corrosion of first degree of multiple sites of right lower limb, except ankle and foot |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is T24.591 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to T24.591. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Corrosion › lower › limb › multiple sites, except ankle and foot › right › first degree (injury) (acid) (caustic) (chemical) (lime) (external) (internal)
Code first — inherited from T24.5
The underlying condition below must be sequenced before T24.591. T24.591 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 T24.591 to fully describe the condition. T24.591 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 T24.591 to fully describe the condition. T24.591 is sequenced first.
Use additional code — inherited from T24.5
Report an additional code alongside T24.591 to fully describe the condition. T24.591 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 T24.591, but a patient may have both at the same time. When documentation supports it, T24.591 and the excluded code may both be reported.
Excludes2 — not included here — inherited from T24
The conditions below are not part of T24.591, but a patient may have both at the same time. When documentation supports it, T24.591 and the excluded code may both be reported.
What codes fall under T24.591? (3)
- T24.591ACorrosion of first degree of multiple sites of right lower limb, except ankle and foot, initial encounter
- T24.591DCorrosion of first degree of multiple sites of right lower limb, except ankle and foot, subsequent encounter
- T24.591SCorrosion of first degree of multiple sites of right lower limb, except ankle and foot, sequela
How long has T24.591 existed?
T24.591 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.