| Q66 | Congenital deformities of feet | NON-BILLABLE CODE |
| Q66.0 | Congenital talipes equinovarus | NON-BILLABLE CODE |
| Q66.00 | Congenital talipes equinovarus, unspecified foot | BILLABLE CODE |
| Q66.01 | Congenital talipes equinovarus, right foot | BILLABLE CODE |
| Q66.02 | Congenital talipes equinovarus, left foot | BILLABLE CODE |
| Q66.1 | Congenital talipes calcaneovarus | NON-BILLABLE CODE |
| Q66.10 | Congenital talipes calcaneovarus, unspecified foot | BILLABLE CODE |
| Q66.11 | Congenital talipes calcaneovarus, right foot | BILLABLE CODE |
| Q66.12 | Congenital talipes calcaneovarus, left foot | BILLABLE CODE |
| Q66.2 | Congenital metatarsus (primus) varus | NON-BILLABLE CODE |
| Q66.21 | Congenital metatarsus primus varus | NON-BILLABLE CODE |
| Q66.211 | Congenital metatarsus primus varus, right foot | BILLABLE CODE |
| Q66.212 | Congenital metatarsus primus varus, left foot | BILLABLE CODE |
| Q66.219 | Congenital metatarsus primus varus, unspecified foot | BILLABLE CODE |
| Q66.22 | Congenital metatarsus adductus | NON-BILLABLE CODE |
| Q66.221 | Congenital metatarsus adductus, right foot | BILLABLE CODE |
| Q66.222 | Congenital metatarsus adductus, left foot | BILLABLE CODE |
| Q66.229 | Congenital metatarsus adductus, unspecified foot | BILLABLE CODE |
| Q66.3 | Other congenital varus deformities of feet | NON-BILLABLE CODE |
| Q66.31 | Other congenital varus deformities of feet, right foot | BILLABLE CODE |
| Q66.32 | Other congenital varus deformities of feet, left foot | BILLABLE CODE |
| Q66.4 | Congenital talipes calcaneovalgus | NON-BILLABLE CODE |
| Q66.40 | Congenital talipes calcaneovalgus, unspecified foot | BILLABLE CODE |
| Q66.41 | Congenital talipes calcaneovalgus, right foot | BILLABLE CODE |
| Q66.42 | Congenital talipes calcaneovalgus, left foot | BILLABLE CODE |
| Q66.5 | Congenital pes planus | NON-BILLABLE CODE |
| Q66.50 | Congenital pes planus, unspecified foot | BILLABLE CODE |
| Q66.51 | Congenital pes planus, right foot | BILLABLE CODE |
| Q66.52 | Congenital pes planus, left foot | BILLABLE CODE |
| Q66.6 | Other congenital valgus deformities of feet | BILLABLE CODE |
| Q66.7 | Congenital pes cavus | NON-BILLABLE CODE |
| Q66.70 | Congenital pes cavus, unspecified foot | BILLABLE CODE |
| Q66.71 | Congenital pes cavus, right foot | BILLABLE CODE |
| Q66.72 | Congenital pes cavus, left foot | BILLABLE CODE |
| Q66.8 | Other congenital deformities of feet | NON-BILLABLE CODE |
| Q66.80 | Congenital vertical talus deformity, unspecified foot | BILLABLE CODE |
| Q66.81 | Congenital vertical talus deformity, right foot | BILLABLE CODE |
| Q66.82 | Congenital vertical talus deformity, left foot | BILLABLE CODE |
| Q66.89 | Other specified congenital deformities of feet | BILLABLE CODE |
| Q66.9 | Congenital deformity of feet, unspecified | NON-BILLABLE CODE |
| Q66.90 | Congenital deformity of feet, unspecified, unspecified foot | BILLABLE CODE |
| Q66.91 | Congenital deformity of feet, unspecified, right foot | BILLABLE CODE |
| Q66.92 | Congenital deformity of feet, unspecified, left foot | BILLABLE CODE |
