ICD-10-CM > Q00-QA0 > Q65-Q79 > Q73 Q73 Reduction defects of unspecified limb Non-Billable/Non-Specific Codes Q73.0Congenital absence of unspecified limb(s)Q73.1Phocomelia, unspecified limb(s)Q73.8Other reduction defects of unspecified limb(s)