ICD-10-CM category
Q66: Congenital deformities of feet
Codes under Q66 (Congenital deformities of feet). A ✓ marks a billable (fully specified) code; category codes without a ✓ are not billable on their own.
| Code | Description | Billable |
|---|---|---|
| Q66.0 | Congenital talipes equinovarus | — |
| Q66.0 | Congenital talipes equinovarus | — |
| Q66.00 | Congenital talipes equinovarus, unspecified foot | ✓ |
| Q66.00 | Congenital talipes equinovarus, unspecified foot | ✓ |
| Q66.01 | Congenital talipes equinovarus, right foot | ✓ |
| Q66.01 | Congenital talipes equinovarus, right foot | ✓ |
| Q66.1 | Congenital talipes calcaneovarus | — |
| Q66.1 | Congenital talipes calcaneovarus | — |
| Q66.02 | Congenital talipes equinovarus, left foot | ✓ |
| Q66.02 | Congenital talipes equinovarus, left foot | ✓ |
| Q66.2 | Congenital metatarsus (primus) varus | — |
| Q66.2 | Congenital metatarsus (primus) varus | — |
| Q66.3 | Other congenital varus deformities of feet | — |
| Q66.3 | Other congenital varus deformities of feet | — |
| Q66.4 | Congenital talipes calcaneovalgus | — |
| Q66.4 | Congenital talipes calcaneovalgus | — |
| Q66.5 | Congenital pes planus | — |
| Q66.5 | Congenital pes planus | — |
| Q66.6 | Other congenital valgus deformities of feet | ✓ |
| Q66.6 | Other congenital valgus deformities of feet | ✓ |
| Q66.7 | Congenital pes cavus | — |
| Q66.7 | Congenital pes cavus | — |
| Q66.8 | Other congenital deformities of feet | — |
| Q66.8 | Other congenital deformities of feet | — |
| Q66.9 | Congenital deformity of feet, unspecified | — |
| Q66.9 | Congenital deformity of feet, unspecified | — |
| Q66.10 | Congenital talipes calcaneovarus, unspecified foot | ✓ |
| Q66.10 | Congenital talipes calcaneovarus, unspecified foot | ✓ |
| Q66.11 | Congenital talipes calcaneovarus, right foot | ✓ |
| Q66.11 | Congenital talipes calcaneovarus, right foot | ✓ |
| Q66.12 | Congenital talipes calcaneovarus, left foot | ✓ |
| Q66.12 | Congenital talipes calcaneovarus, left foot | ✓ |
| Q66.21 | Congenital metatarsus primus varus | — |
| Q66.21 | Congenital metatarsus primus varus | — |
| Q66.22 | Congenital metatarsus adductus | — |
| Q66.22 | Congenital metatarsus adductus | — |
| Q66.30 | Other congenital varus deformities of feet, unspecified foot | ✓ |
| Q66.30 | Other congenital varus deformities of feet, unspecified foot | ✓ |
| Q66.31 | Other congenital varus deformities of feet, right foot | ✓ |
| Q66.31 | Other congenital varus deformities of feet, right foot | ✓ |
| Q66.32 | Other congenital varus deformities of feet, left foot | ✓ |
| Q66.32 | Other congenital varus deformities of feet, left foot | ✓ |
| Q66.40 | Congenital talipes calcaneovalgus, unspecified foot | ✓ |
| Q66.40 | Congenital talipes calcaneovalgus, unspecified foot | ✓ |
| Q66.41 | Congenital talipes calcaneovalgus, right foot | ✓ |
| Q66.41 | Congenital talipes calcaneovalgus, right foot | ✓ |
| Q66.42 | Congenital talipes calcaneovalgus, left foot | ✓ |
| Q66.42 | Congenital talipes calcaneovalgus, left foot | ✓ |
| Q66.50 | Congenital pes planus, unspecified foot | ✓ |
| Q66.50 | Congenital pes planus, unspecified foot | ✓ |
| Q66.51 | Congenital pes planus, right foot | ✓ |
| Q66.51 | Congenital pes planus, right foot | ✓ |
| Q66.52 | Congenital pes planus, left foot | ✓ |
| Q66.52 | Congenital pes planus, left foot | ✓ |
| Q66.70 | Congenital pes cavus, unspecified foot | ✓ |
| Q66.70 | Congenital pes cavus, unspecified foot | ✓ |
| Q66.71 | Congenital pes cavus, right foot | ✓ |
| Q66.71 | Congenital pes cavus, right foot | ✓ |
| Q66.72 | Congenital pes cavus, left foot | ✓ |
| Q66.72 | Congenital pes cavus, left foot | ✓ |
| Q66.80 | Congenital vertical talus deformity, unspecified foot | ✓ |
| Q66.80 | Congenital vertical talus deformity, unspecified foot | ✓ |
| Q66.81 | Congenital vertical talus deformity, right foot | ✓ |
| Q66.81 | Congenital vertical talus deformity, right foot | ✓ |
| Q66.82 | Congenital vertical talus deformity, left foot | ✓ |
| Q66.82 | Congenital vertical talus deformity, left foot | ✓ |
| Q66.89 | Other specified congenital deformities of feet | ✓ |
| Q66.89 | Other specified congenital deformities of feet | ✓ |
| Q66.90 | Congenital deformity of feet, unspecified, unspecified foot | ✓ |
| Q66.90 | Congenital deformity of feet, unspecified, unspecified foot | ✓ |
| Q66.91 | Congenital deformity of feet, unspecified, right foot | ✓ |
| Q66.91 | Congenital deformity of feet, unspecified, right foot | ✓ |
| Q66.92 | Congenital deformity of feet, unspecified, left foot | ✓ |
| Q66.92 | Congenital deformity of feet, unspecified, left foot | ✓ |
| Q66.211 | Congenital metatarsus primus varus, right foot | ✓ |
| Q66.211 | Congenital metatarsus primus varus, right foot | ✓ |
| Q66.212 | Congenital metatarsus primus varus, left foot | ✓ |
| Q66.212 | Congenital metatarsus primus varus, left foot | ✓ |
| Q66.219 | Congenital metatarsus primus varus, unspecified foot | ✓ |
| Q66.219 | Congenital metatarsus primus varus, unspecified foot | ✓ |
| Q66.221 | Congenital metatarsus adductus, right foot | ✓ |
| Q66.221 | Congenital metatarsus adductus, right foot | ✓ |
| Q66.222 | Congenital metatarsus adductus, left foot | ✓ |
| Q66.222 | Congenital metatarsus adductus, left foot | ✓ |
| Q66.229 | Congenital metatarsus adductus, unspecified foot | ✓ |
| Q66.229 | Congenital metatarsus adductus, unspecified foot | ✓ |
Frequently asked questions
What is ICD-10-CM code Q66?
Q66 is an ICD-10-CM category covering Congenital deformities of feet. It contains 86 more specific diagnosis codes, 64 of which are billable.
Is Q66 a billable code?
No — Q66 is a category header and isn't billable on its own. Code to the highest level of specificity using one of its subcodes (for example Q66.0 — Congenital talipes equinovarus). 64 of the 86 codes under Q66 are billable.
What codes fall under Q66?
Q66 includes Q66.0, Q66.0, Q66.00, Q66.00, Q66.01, plus 81 more. See the full list with descriptions and billable status above.
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Informational only, not coding or medical advice. Verify against the official ICD-10-CM (FY2026) and your payer's guidelines.
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