S91.021A (Laceration with foreign body, right ankle, initial encounter) compared with S91.029A (Laceration with foreign body, unspecified ankle, initial encounter), from the official CMS tabular data. S91.021A and S91.029A 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. S91.021A and S91.029A 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.
| S91.021ALaceration with foreign body, right ankle, initial encounter | S91.029ALaceration with foreign body, unspecified ankle, initial 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 | Laceration with foreign body, right ankle, initial encounter is a billable ICD-10-CM diagnosis code (S91.021A). | Laceration with foreign body, unspecified ankle, initial encounter is a billable ICD-10-CM diagnosis code (S91.029A). |
| 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