Q66.211 (Congenital metatarsus primus varus, right foot) compared with Q66.212 (Congenital metatarsus primus varus, left foot), from the official CMS tabular data. Q66.211 and Q66.212 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. Q66.211 and Q66.212 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.
| Q66.211Congenital metatarsus primus varus, right foot | Q66.212Congenital metatarsus primus varus, left foot | |
|---|---|---|
| Billing status | Billable | Billable |
| Classification | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) | Q00-Q99 — Congenital Malformations, Deformations and Chromosomal Abnormalities (Q00-Q99) |
| Definition | Congenital metatarsus primus varus, right foot is a billable ICD-10-CM diagnosis code (Q66.211). | Congenital metatarsus primus varus, left foot is a billable ICD-10-CM diagnosis code (Q66.212). |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources