ICD-10-CM > Q00-QA0 > Q65-Q79 > Q66 > Q66.2 > Q66.21 Q66.21 Congenital metatarsus primus varus Non-Billable/Non-Specific Codes Q66.211Congenital metatarsus primus varus, right footQ66.212Congenital metatarsus primus varus, left footQ66.219Congenital metatarsus primus varus, unspecified foot