ICD-10-CM > M00-M99 > M20-M25 > M21 > M21.2 > M21.22 M21.22 Flexion deformity, elbow Non-Billable/Non-Specific Codes M21.221Flexion deformity, right elbowM21.222Flexion deformity, left elbowM21.229Flexion deformity, unspecified elbow