M21.6X1 (Other acquired deformities of right foot) compared with M21.6X2 (Other acquired deformities of left foot), from the official CMS tabular data. M21.6X1 and M21.6X2 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. M21.6X1 and M21.6X2 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.
| M21.6X1Other acquired deformities of right foot | M21.6X2Other acquired deformities of left foot | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) | M00-M99 — Diseases of the Musculoskeletal System and Connective Tissue (M00-M99) |
| Definition | Other acquired deformities of right foot is a billable ICD-10-CM diagnosis code (M21.6X1). | Other acquired deformities of left foot is a billable ICD-10-CM diagnosis code (M21.6X2). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources