ICD-10-CM > Q00-QA0 > Q65-Q79 > Q66 > Q66.8 Q66.8 Other congenital deformities of feet Non-Billable/Non-Specific Codes Q66.80Congenital vertical talus deformity, unspecified footQ66.81Congenital vertical talus deformity, right footQ66.82Congenital vertical talus deformity, left footQ66.89Other specified congenital deformities of feet