S86.091 (Other specified injury of right Achilles tendon) compared with S86.099 (Other specified injury of unspecified Achilles tendon), from the official CMS tabular data. S86.091 and S86.099 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. S86.091 and S86.099 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.
| S86.091Other specified injury of right Achilles tendon | S86.099Other specified injury of unspecified Achilles tendon | |
|---|---|---|
| Billing status | Non-billable header | Non-billable header |
| 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 | Other specified injury of right Achilles tendon is a non-billable ICD-10-CM category code (S86.091). | Other specified injury of unspecified Achilles tendon is a non-billable ICD-10-CM category code (S86.099). |
| 7th character | The appropriate 7th character is to be added to each code from category S86 | The appropriate 7th character is to be added to each code from category S86 |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources