T23.64 — Corrosion of second degree of multiple fingers (nail), including thumb
Is T23.64 billable?
No — T23.64 is a non-billable header code. T23.64 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 T23.64.
Billable codes under this header
- T23.641ACorrosion of second degree of multiple right fingers (nail), including thumb, initial encounter
- T23.641DCorrosion of second degree of multiple right fingers (nail), including thumb, subsequent encounter
- T23.641SCorrosion of second degree of multiple right fingers (nail), including thumb, sequela
- T23.642ACorrosion of second degree of multiple left fingers (nail), including thumb, initial encounter
- T23.642DCorrosion of second degree of multiple left fingers (nail), including thumb, subsequent encounter
- T23.642SCorrosion of second degree of multiple left fingers (nail), including thumb, sequela
- T23.649ACorrosion of second degree of unspecified multiple fingers (nail), including thumb, initial encounter
- T23.649DCorrosion of second degree of unspecified multiple fingers (nail), including thumb, subsequent encounter
- T23.649SCorrosion of second degree of unspecified multiple fingers (nail), including thumb, sequela
T23.64 at a glance
| Code | T23.64 |
|---|---|
| Description | Corrosion of second degree of multiple fingers (nail), including thumb |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Code first — inherited from T23.6
The underlying condition below must be sequenced before T23.64. T23.64 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 T23.64 to fully describe the condition. T23.64 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 T23.64 to fully describe the condition. T23.64 is sequenced first.
Use additional code — inherited from T23.6
Report an additional code alongside T23.64 to fully describe the condition. T23.64 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 T23.64, but a patient may have both at the same time. When documentation supports it, T23.64 and the excluded code may both be reported.
What codes fall under T23.64? (3)
How long has T23.64 existed?
T23.64 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 T23.6 family? (8)
- T23.60Corrosion of second degree of hand, unspecified sitenot billable
- T23.61Corrosion of second degree of thumb (nail)not billable
- T23.62Corrosion of second degree of single finger (nail) except thumbnot billable
- T23.63Corrosion of second degree of multiple fingers (nail), not including thumbnot billable
- T23.65Corrosion of second degree of palmnot billable
- T23.66Corrosion of second degree of back of handnot billable
- T23.67Corrosion of second degree of wristnot billable
- T23.69Corrosion of second degree of multiple sites of wrist and handnot billable