S84.90XS — Injury of unspecified nerve at lower leg level, unspecified leg, sequela
Is S84.90XS billable?
Yes, but S84.90XS is an unspecified code. S84.90XS is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, S84.90XS 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 S84.90XS — the more specific alternatives are listed below.
More specific alternatives
- S84.00XSInjury of tibial nerve at lower leg level, unspecified leg, sequela
- S84.10XSInjury of peroneal nerve at lower leg level, unspecified leg, sequela
- S84.20XSInjury of cutaneous sensory nerve at lower leg level, unspecified leg, sequela
- S84.801SInjury of other nerves at lower leg level, right leg, sequela
S84.90XS at a glance
| Code | S84.90XS |
|---|---|
| Description | Injury of unspecified nerve at lower leg level, unspecified leg, sequela |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "S" | sequela |
What does the 7th character "S" mean in S84.90XS?
In S84.90XS, the 7th character S means sequela. The 7th character is required for S84.90XS to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does S84.90XS group to?
S84.90XS sits in MDC 01 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 091Other Disorders of Nervous System with MCCmedical
- 092Other Disorders of Nervous System with CCmedical
- 093Other Disorders of Nervous System without CC/MCCmedical
How is S84.90XS listed in the Alphabetic Index?
The Alphabetic Index lists these routes under S84.9, the nearest indexed parent of S84.90XS. Use them to find the family, then select the specific code.
- Injury › nerve NEC › leg
Use additional code — inherited from Chapter 19
Report an additional code alongside S84.90XS to fully describe the condition. S84.90XS 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 S84.90XS, but a patient may have both at the same time. When documentation supports it, S84.90XS and the excluded code may both be reported.
Excludes2 — not included here — inherited from S80-S89
The conditions below are not part of S84.90XS, but a patient may have both at the same time. When documentation supports it, S84.90XS and the excluded code may both be reported.
Excludes2 — not included here — inherited from S84
The conditions below are not part of S84.90XS, but a patient may have both at the same time. When documentation supports it, S84.90XS and the excluded code may both be reported.
- injury of nerves at ankle and foot level (S94.-)
Code also — inherited from S84
Two codes may be needed to describe the condition fully. Whether S84.90XS is sequenced first depends on the reason for the encounter.
- any associated open wound (S81.-)
How long has S84.90XS existed?
S84.90XS 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.