S94.21XA — Injury of deep peroneal nerve at ankle and foot level, right leg, initial encounter
Is S94.21XA billable?
Yes — S94.21XA is billable for FY2027. S94.21XA is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. S94.21XA may be submitted for encounters from October 1, 2026 through September 30, 2027.
S94.21XA at a glance
| Code | S94.21XA |
|---|---|
| Description | Injury of deep peroneal nerve at ankle and foot level, right leg, 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 S94.21XA?
In S94.21XA, the 7th character A means initial encounter. The 7th character is required for S94.21XA to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does S94.21XA group to?
S94.21XA 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 S94.21XA listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S94.2, the nearest indexed parent of S94.21XA. Use them to find the family, then select the specific code.
- Injury › nerve NEC › foot › deep peroneal
- Injury › nerve NEC › peroneal › foot
Use additional code — inherited from Chapter 19
Report an additional code alongside S94.21XA to fully describe the condition. S94.21XA 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 S94.21XA, but a patient may have both at the same time. When documentation supports it, S94.21XA and the excluded code may both be reported.
Excludes2 — not included here — inherited from S90-S99
The conditions below are not part of S94.21XA, but a patient may have both at the same time. When documentation supports it, S94.21XA and the excluded code may both be reported.
Code also — inherited from S94
Two codes may be needed to describe the condition fully. Whether S94.21XA is sequenced first depends on the reason for the encounter.
- any associated open wound (S91.-)
How long has S94.21XA existed?
S94.21XA 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.