ICD-10-CM > M00-M99 > M20-M25 > M21 > M21.9 > M21.94 M21.94 Unspecified acquired deformity of hand Non-Billable/Non-Specific Codes M21.941Unspecified acquired deformity of hand, right handM21.942Unspecified acquired deformity of hand, left handM21.949Unspecified acquired deformity of hand, unspecified hand