S64.30 (Injury of digital nerve of unspecified thumb) compared with S64.31 (Injury of digital nerve of right thumb), from the official CMS tabular data. S64.30 and S64.31 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. S64.30 and S64.31 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.
| S64.30Injury of digital nerve of unspecified thumb | S64.31Injury of digital nerve of right thumb | |
|---|---|---|
| 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 digital nerve of unspecified thumb is a non-billable ICD-10-CM category code (S64.30). | Injury of digital nerve of right thumb is a non-billable ICD-10-CM category code (S64.31). |
| 7th character | The appropriate 7th character is to be added to each code from category S64 | The appropriate 7th character is to be added to each code from category S64 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources