ICD-10-CM > M00-M99 > M20-M25 > M21 > M21.2 > M21.25 M21.25 Flexion deformity, hip Non-Billable/Non-Specific Codes M21.251Flexion deformity, right hipM21.252Flexion deformity, left hipM21.259Flexion deformity, unspecified hip