S54.90 (Injury of unspecified nerve at forearm level, unspecified arm) compared with S54.91 (Injury of unspecified nerve at forearm level, right arm), from the official CMS tabular data. S54.90 and S54.91 code the same condition on opposite sides. MedCoder-derived
Same condition; these differ only in which side is documented.
These codes share a category and title and differ only in the side affected. The documentation decides which applies, and a bilateral code is reported only where the code set provides one.
Source: ICD-10-CM tabular list (laterality variant derived from the code title)
Same condition, opposite side. S54.90 and S54.91 name the same condition on opposite sides of the body.
Same category and title, differing only in which side is affected — the documentation decides which one applies, and a bilateral code is reported only where the code set provides one.
| S54.90Injury of unspecified nerve at forearm level, unspecified arm | S54.91Injury of unspecified nerve at forearm level, right arm | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| Classification | S00-T88 — Injury, poisoning and certain other consequences of external causes | S00-T88 — Injury, poisoning and certain other consequences of external causes |
| Definition | Injury of unspecified nerve at forearm level, unspecified arm is a non-billable ICD-10-CM category code (S54.90). | Injury of unspecified nerve at forearm level, right arm is a non-billable ICD-10-CM category code (S54.91). |
| 7th character | The appropriate 7th character is to be added to each code from category S54 | The appropriate 7th character is to be added to each code from category S54 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources