T23.502A — Corrosion of first degree of left hand, unspecified site, initial encounter
Is T23.502A billable?
Yes, but T23.502A is an unspecified code. T23.502A is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, T23.502A 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 T23.502A — the more specific alternatives are listed below.
More specific alternatives
- T23.511ACorrosion of first degree of right thumb (nail), initial encounter
- T23.521ACorrosion of first degree of single right finger (nail) except thumb, initial encounter
- T23.531ACorrosion of first degree of multiple right fingers (nail), not including thumb, initial encounter
- T23.541ACorrosion of first degree of multiple right fingers (nail), including thumb, initial encounter
- T23.551ACorrosion of first degree of right palm, initial encounter
- T23.561ACorrosion of first degree of back of right hand, initial encounter
- T23.571ACorrosion of first degree of right wrist, initial encounter
- T23.591ACorrosion of first degree of multiple sites of right wrist and hand, initial encounter
T23.502A at a glance
| Code | T23.502A |
|---|---|
| Description | Corrosion of first degree of left hand, unspecified site, 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 T23.502A?
In T23.502A, the 7th character A means initial encounter. The 7th character is required for T23.502A to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T23.502A group to?
T23.502A 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 T23.502A listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T23.502, the nearest indexed parent of T23.502A. Use them to find the family, then select the specific code.
- Corrosion › hand › left › first degree (injury) (acid) (caustic) (chemical) (lime) (external) (internal)
Code first — inherited from T23.5
The underlying condition below must be sequenced before T23.502A. T23.502A 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 T23.502A to fully describe the condition. T23.502A 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 T23.502A to fully describe the condition. T23.502A is sequenced first.
Use additional code — inherited from T23.5
Report an additional code alongside T23.502A to fully describe the condition. T23.502A 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 T23.502A, but a patient may have both at the same time. When documentation supports it, T23.502A and the excluded code may both be reported.
How long has T23.502A existed?
T23.502A 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.