M63.872 (Disorders of muscle in diseases classified elsewhere, left ankle and foot) compared with M63.879 (Disorders of muscle in diseases classified elsewhere, unspecified ankle and foot), from the official CMS tabular data. M63.872 and M63.879 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. M63.872 and M63.879 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.
| M63.872Disorders of muscle in diseases classified elsewhere, left ankle and foot | M63.879Disorders of muscle in diseases classified elsewhere, unspecified ankle and foot | |
|---|---|---|
| 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 | Disorders of muscle in diseases classified elsewhere, left ankle and foot is a billable ICD-10-CM diagnosis code (M63.872). | Disorders of muscle in diseases classified elsewhere, unspecified ankle and foot is a billable ICD-10-CM diagnosis code (M63.879). |
| Code first | underlying disease, such as: leprosy (A30.-) | underlying disease, such as: leprosy (A30.-) |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources