S91.001D (Unspecified open wound, right ankle, subsequent encounter) compared with S91.002D (Unspecified open wound, left ankle, subsequent encounter), from the official CMS tabular data. S91.001D and S91.002D 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. S91.001D and S91.002D 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.
| S91.001DUnspecified open wound, right ankle, subsequent encounter | S91.002DUnspecified open wound, left ankle, subsequent encounter | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) | S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) |
| Definition | Unspecified open wound, right ankle, subsequent encounter is a billable ICD-10-CM diagnosis code (S91.001D). | Unspecified open wound, left ankle, subsequent encounter is a billable ICD-10-CM diagnosis code (S91.002D). |
| 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