ICD-10-CM > M00-M99 > M20-M25 > M21 > M21.8 > M21.82 M21.82 Other specified acquired deformities of upper arm Non-Billable/Non-Specific Codes M21.821Other specified acquired deformities of right upper armM21.822Other specified acquired deformities of left upper armM21.829Other specified acquired deformities of unspecified upper arm