ICD-10-CM > M00-M99 > M20-M25 > M21 > M21.8 M21.8 Other specified acquired deformities of limbs Non-Billable/Non-Specific Type 2 Excludes coxa plana (M91.2) Codes M21.80Other specified acquired deformities of unspecified limbM21.82Other specified acquired deformities of upper armM21.821Other specified acquired deformities of right upper armM21.822Other specified acquired deformities of left upper armM21.829Other specified acquired deformities of unspecified upper armM21.83Other specified acquired deformities of forearmM21.831Other specified acquired deformities of right forearmM21.832Other specified acquired deformities of left forearmM21.839Other specified acquired deformities of unspecified forearmM21.85Other specified acquired deformities of thighM21.851Other specified acquired deformities of right thighM21.852Other specified acquired deformities of left thighM21.859Other specified acquired deformities of unspecified thighM21.86Other specified acquired deformities of lower legM21.861Other specified acquired deformities of right lower legM21.862Other specified acquired deformities of left lower legM21.869Other specified acquired deformities of unspecified lower leg