ICD-10-CM > M00-M99 > M20-M25 > M21 > M21.2 > M21.23 M21.23 Flexion deformity, wrist Non-Billable/Non-Specific Codes M21.231Flexion deformity, right wristM21.232Flexion deformity, left wristM21.239Flexion deformity, unspecified wrist