T23.4 — Corrosion of unspecified degree of wrist and hand
Not billable
Is T23.4 billable?
No — T23.4 is a non-billable header code. T23.4 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 60 billable codes beneath T23.4.
Billable codes under this header
- T23.401ACorrosion of unspecified degree of right hand, unspecified site, initial encounter
- T23.401DCorrosion of unspecified degree of right hand, unspecified site, subsequent encounter
- T23.401SCorrosion of unspecified degree of right hand, unspecified site, sequela
- T23.402ACorrosion of unspecified degree of left hand, unspecified site, initial encounter
- T23.402DCorrosion of unspecified degree of left hand, unspecified site, subsequent encounter
- T23.402SCorrosion of unspecified degree of left hand, unspecified site, sequela
- T23.409ACorrosion of unspecified degree of unspecified hand, unspecified site, initial encounter
- T23.409DCorrosion of unspecified degree of unspecified hand, unspecified site, subsequent encounter
- T23.409SCorrosion of unspecified degree of unspecified hand, unspecified site, sequela
- T23.411ACorrosion of unspecified degree of right thumb (nail), initial encounter
- T23.411DCorrosion of unspecified degree of right thumb (nail), subsequent encounter
- T23.411SCorrosion of unspecified degree of right thumb (nail), sequela
- T23.412ACorrosion of unspecified degree of left thumb (nail), initial encounter
- T23.412DCorrosion of unspecified degree of left thumb (nail), subsequent encounter
- T23.412SCorrosion of unspecified degree of left thumb (nail), sequela
- T23.419ACorrosion of unspecified degree of unspecified thumb (nail), initial encounter
- T23.419DCorrosion of unspecified degree of unspecified thumb (nail), subsequent encounter
- T23.419SCorrosion of unspecified degree of unspecified thumb (nail), sequela
- T23.421ACorrosion of unspecified degree of single right finger (nail) except thumb, initial encounter
- T23.421DCorrosion of unspecified degree of single right finger (nail) except thumb, subsequent encounter
- T23.421SCorrosion of unspecified degree of single right finger (nail) except thumb, sequela
- T23.422ACorrosion of unspecified degree of single left finger (nail) except thumb, initial encounter
- T23.422DCorrosion of unspecified degree of single left finger (nail) except thumb, subsequent encounter
- T23.422SCorrosion of unspecified degree of single left finger (nail) except thumb, sequela
- T23.429ACorrosion of unspecified degree of unspecified single finger (nail) except thumb, initial encounter
- T23.429DCorrosion of unspecified degree of unspecified single finger (nail) except thumb, subsequent encounter
- T23.429SCorrosion of unspecified degree of unspecified single finger (nail) except thumb, sequela
- T23.431ACorrosion of unspecified degree of multiple right fingers (nail), not including thumb, initial encounter
- T23.431DCorrosion of unspecified degree of multiple right fingers (nail), not including thumb, subsequent encounter
- T23.431SCorrosion of unspecified degree of multiple right fingers (nail), not including thumb, sequela
- T23.432ACorrosion of unspecified degree of multiple left fingers (nail), not including thumb, initial encounter
- T23.432DCorrosion of unspecified degree of multiple left fingers (nail), not including thumb, subsequent encounter
- T23.432SCorrosion of unspecified degree of multiple left fingers (nail), not including thumb, sequela
- T23.439ACorrosion of unspecified degree of unspecified multiple fingers (nail), not including thumb, initial encounter
- T23.439DCorrosion of unspecified degree of unspecified multiple fingers (nail), not including thumb, subsequent encounter
- T23.439SCorrosion of unspecified degree of unspecified multiple fingers (nail), not including thumb, sequela
- T23.441ACorrosion of unspecified degree of multiple right fingers (nail), including thumb, initial encounter
- T23.441DCorrosion of unspecified degree of multiple right fingers (nail), including thumb, subsequent encounter
- T23.441SCorrosion of unspecified degree of multiple right fingers (nail), including thumb, sequela
- T23.442ACorrosion of unspecified degree of multiple left fingers (nail), including thumb, initial encounter
- T23.442DCorrosion of unspecified degree of multiple left fingers (nail), including thumb, subsequent encounter
- T23.442SCorrosion of unspecified degree of multiple left fingers (nail), including thumb, sequela
- T23.449ACorrosion of unspecified degree of unspecified multiple fingers (nail), including thumb, initial encounter
- T23.449DCorrosion of unspecified degree of unspecified multiple fingers (nail), including thumb, subsequent encounter
- T23.449SCorrosion of unspecified degree of unspecified multiple fingers (nail), including thumb, sequela
- T23.451ACorrosion of unspecified degree of right palm, initial encounter
- T23.451DCorrosion of unspecified degree of right palm, subsequent encounter
- T23.451SCorrosion of unspecified degree of right palm, sequela
- T23.452ACorrosion of unspecified degree of left palm, initial encounter
- T23.452DCorrosion of unspecified degree of left palm, subsequent encounter
- T23.452SCorrosion of unspecified degree of left palm, sequela
- T23.459ACorrosion of unspecified degree of unspecified palm, initial encounter
- T23.459DCorrosion of unspecified degree of unspecified palm, subsequent encounter
- T23.459SCorrosion of unspecified degree of unspecified palm, sequela
- T23.461ACorrosion of unspecified degree of back of right hand, initial encounter
- T23.461DCorrosion of unspecified degree of back of right hand, subsequent encounter
- T23.461SCorrosion of unspecified degree of back of right hand, sequela
- T23.462ACorrosion of unspecified degree of back of left hand, initial encounter
- T23.462DCorrosion of unspecified degree of back of left hand, subsequent encounter
- T23.462SCorrosion of unspecified degree of back of left hand, sequela
T23.4 at a glance
| Code | T23.4 |
|---|---|
| Description | Corrosion of unspecified degree of wrist and hand |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Code first
The underlying condition below must be sequenced before T23.4. T23.4 describes a manifestation and cannot be the principal or first-listed diagnosis.
- (T51-T65) to identify chemical and intent
Use additional code
Report an additional code alongside T23.4 to fully describe the condition. T23.4 is sequenced first.
- external cause code to identify place (Y92)
Use additional code — inherited from Chapter 19
Report an additional code alongside T23.4 to fully describe the condition. T23.4 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 T23.4 to fully describe the condition. T23.4 is sequenced first.
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T23.4, but a patient may have both at the same time. When documentation supports it, T23.4 and the excluded code may both be reported.
What codes fall under T23.4? (9)
- T23.40Corrosion of unspecified degree of hand, unspecified sitenot billable
- T23.41Corrosion of unspecified degree of thumb (nail)not billable
- T23.42Corrosion of unspecified degree of single finger (nail) except thumbnot billable
- T23.43Corrosion of unspecified degree of multiple fingers (nail), not including thumbnot billable
- T23.44Corrosion of unspecified degree of multiple fingers (nail), including thumbnot billable
- T23.45Corrosion of unspecified degree of palmnot billable
- T23.46Corrosion of unspecified degree of back of handnot billable
- T23.47Corrosion of unspecified degree of wristnot billable
- T23.49Corrosion of unspecified degree of multiple sites of wrist and handnot billable
How long has T23.4 existed?
T23.4 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 family? (7)
- T23.0Burn of unspecified degree of wrist and handnot billable
- T23.1Burn of first degree of wrist and handnot billable
- T23.2Burn of second degree of wrist and handnot billable
- T23.3Burn of third degree of wrist and handnot billable
- T23.5Corrosion of first degree of wrist and handnot billable
- T23.6Corrosion of second degree of wrist and handnot billable
- T23.7Corrosion of third degree of wrist and handnot billable