S64.40XA — Injury of digital nerve of unspecified finger, initial encounter
Is S64.40XA billable?
Yes, but S64.40XA is an unspecified code. S64.40XA is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, S64.40XA 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 S64.40XA — the more specific alternatives are listed below.
More specific alternatives
- S64.00XAInjury of ulnar nerve at wrist and hand level of unspecified arm, initial encounter
- S64.10XAInjury of median nerve at wrist and hand level of unspecified arm, initial encounter
- S64.20XAInjury of radial nerve at wrist and hand level of unspecified arm, initial encounter
- S64.30XAInjury of digital nerve of unspecified thumb, initial encounter
- S64.8X1AInjury of other nerves at wrist and hand level of right arm, initial encounter
S64.40XA at a glance
| Code | S64.40XA |
|---|---|
| Description | Injury of digital nerve of unspecified finger, 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 S64.40XA?
In S64.40XA, the 7th character A means initial encounter. The 7th character is required for S64.40XA to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does S64.40XA group to?
S64.40XA sits in MDC 01 and helps define the logic of 2 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 073Cranial and Peripheral Nerve Disorders with MCCmedical
- 074Cranial and Peripheral Nerve Disorders without MCCmedical
How is S64.40XA listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S64.4, the nearest indexed parent of S64.40XA. Use them to find the family, then select the specific code.
- Injury › nerve NEC › digital › finger
Use additional code — inherited from Chapter 19
Report an additional code alongside S64.40XA to fully describe the condition. S64.40XA is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of S64.40XA, but a patient may have both at the same time. When documentation supports it, S64.40XA and the excluded code may both be reported.
Excludes2 — not included here — inherited from S60-S69
The conditions below are not part of S64.40XA, but a patient may have both at the same time. When documentation supports it, S64.40XA and the excluded code may both be reported.
Code also — inherited from S64
Two codes may be needed to describe the condition fully. Whether S64.40XA is sequenced first depends on the reason for the encounter.
- any associated open wound (S61.-)
How long has S64.40XA existed?
S64.40XA 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.