S81.001S (Unspecified open wound, right knee, sequela) compared with S81.009S (Unspecified open wound, unspecified knee, sequela), from the official CMS tabular data. S81.001S and S81.009S 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. S81.001S and S81.009S 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.
| S81.001SUnspecified open wound, right knee, sequela | S81.009SUnspecified open wound, unspecified knee, 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 knee, sequela is a billable ICD-10-CM diagnosis code (S81.001S). | Unspecified open wound, unspecified knee, sequela is a billable ICD-10-CM diagnosis code (S81.009S). |
| 7th character | The appropriate 7th character is to be added to each code from category S81 | The appropriate 7th character is to be added to each code from category S81 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources