T23.71 — Corrosion of third degree of thumb (nail)
Is T23.71 billable?
No — T23.71 is a non-billable header code. T23.71 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 T23.71.
Billable codes under this header
- T23.711ACorrosion of third degree of right thumb (nail), initial encounter
- T23.711DCorrosion of third degree of right thumb (nail), subsequent encounter
- T23.711SCorrosion of third degree of right thumb (nail), sequela
- T23.712ACorrosion of third degree of left thumb (nail), initial encounter
- T23.712DCorrosion of third degree of left thumb (nail), subsequent encounter
- T23.712SCorrosion of third degree of left thumb (nail), sequela
- T23.719ACorrosion of third degree of unspecified thumb (nail), initial encounter
- T23.719DCorrosion of third degree of unspecified thumb (nail), subsequent encounter
- T23.719SCorrosion of third degree of unspecified thumb (nail), sequela
T23.71 at a glance
| Code | T23.71 |
|---|---|
| Description | Corrosion of third degree of thumb (nail) |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Code first — inherited from T23.7
The underlying condition below must be sequenced before T23.71. T23.71 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 T23.71 to fully describe the condition. T23.71 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 T23.71 to fully describe the condition. T23.71 is sequenced first.
Use additional code — inherited from T23.7
Report an additional code alongside T23.71 to fully describe the condition. T23.71 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 T23.71, but a patient may have both at the same time. When documentation supports it, T23.71 and the excluded code may both be reported.
What codes fall under T23.71? (3)
How long has T23.71 existed?
T23.71 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.
What other codes are in the T23.7 family? (8)
- T23.70Corrosion of third degree of hand, unspecified sitenot billable
- T23.72Corrosion of third degree of single finger (nail) except thumbnot billable
- T23.73Corrosion of third degree of multiple fingers (nail), not including thumbnot billable
- T23.74Corrosion of third degree of multiple fingers (nail), including thumbnot billable
- T23.75Corrosion of third degree of palmnot billable
- T23.76Corrosion of third degree of back of handnot billable
- T23.77Corrosion of third degree of wristnot billable
- T23.79Corrosion of third degree of multiple sites of wrist and handnot billable