ICD-10-CM > M00-M99 > M20-M25 > M21 > M21.8 > M21.86 M21.86 Other specified acquired deformities of lower leg Non-Billable/Non-Specific Codes M21.861Other specified acquired deformities of right lower legM21.862Other specified acquired deformities of left lower legM21.869Other specified acquired deformities of unspecified lower leg