Flexion deformity, unspecified hip

This code signifies an abnormal, persistent bending or contracture of the hip joint, where the hip remains in a flexed position. This deformity restricts the hip's ability to fully extend, potentially impacting mobility and function. The "unspecified" nature indicates that the laterality (left or right hip) is not documented.

Use this code when documentation clearly states a flexion deformity of the hip, but the specific side affected (left or right) is not specified. This typically occurs when a clinician notes "flexion deformity of hip" without further detail. Supporting documentation includes physical exam findings describing limited hip extension due to contracture.

• Avoid using this code if the laterality of the hip deformity is documented; instead, use the more specific codes for left (M21.251) or right (M21.252) hip.
• Always query the provider for laterality if possible to ensure the most specific code is assigned.
• Consider any underlying conditions contributing to the flexion deformity and code them as primary or secondary diagnoses as appropriate.