S91.301S (Unspecified open wound, right foot, sequela) compared with S91.309S (Unspecified open wound, unspecified foot, sequela), from the official CMS tabular data. S91.301S and S91.309S code the same condition on opposite sides.
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. S91.301S and S91.309S 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.
| S91.301SUnspecified open wound, right foot, sequela | S91.309SUnspecified open wound, unspecified foot, sequela | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | S00-T88 — Injury, poisoning and certain other consequences of external causes | S00-T88 — Injury, poisoning and certain other consequences of external causes |
| Definition | Unspecified open wound, right foot, sequela is a billable ICD-10-CM diagnosis code (S91.301S). | Unspecified open wound, unspecified foot, sequela is a billable ICD-10-CM diagnosis code (S91.309S). |
| 7th character | The appropriate 7th character is to be added to each code from category S91 | The appropriate 7th character is to be added to each code from category S91 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources