M25.671 (Stiffness of right ankle, not elsewhere classified) compared with M25.673 (Stiffness of unspecified ankle, not elsewhere classified), from the official CMS tabular data. M25.671 and M25.673 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. M25.671 and M25.673 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.
| M25.671Stiffness of right ankle, not elsewhere classified | M25.673Stiffness of unspecified ankle, not elsewhere classified | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | M00-M99 — Diseases of the musculoskeletal system and connective tissue | M00-M99 — Diseases of the musculoskeletal system and connective tissue |
| Definition | Stiffness of right ankle, not elsewhere classified is a billable ICD-10-CM diagnosis code (M25.671). | Stiffness of unspecified ankle, not elsewhere classified is a billable ICD-10-CM diagnosis code (M25.673). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources