Hip Ankylosis and Flail Joint VA Ratings: DC 5250 and 5254

In VA disability evaluation, ankylosis has a precise regulatory and medical definition: complete, bony or fibrous immobility of the joint. It is not equivalent to severe pain, partial stiffness, or arthritis where some motion remains. When a hip joint is completely ankylosed, motion is zero degrees across all planes. The disability evaluation depends entirely on the angle at which the thigh bone is fused or locked relative to the pelvis.

Diagnostic Code 5250 divides hip ankylosis into three specific percentage tiers: 60% for favorable ankylosis, where the hip is fixed in flexion between 20 and 40 degrees with slight adduction or abduction, allowing acceptable sitting and walking; 70% for intermediate ankylosis, fixed between the favorable and unfavorable ranges; and 90% for extremely unfavorable ankylosis, where flexion exceeds 40 degrees, severe adduction causes scissoring of the legs, or the foot does not reach the ground and crutches are necessitated.

At the opposite biomechanical extreme from ankylosis is a flail joint, listed in 38 CFR 4.71a under Diagnostic Code 5254 at an 80% disability rating. The rating schedule does not elaborate sub-criteria for DC 5254, listing simply "Hip, flail joint: 80%." In clinical practice, an examiner's description of a flail hip joint explains extreme joint instability and abnormal mobility, such as after severe bone loss, resection arthroplasty (Girdlestone procedure), or profound ligamentous disruption where the joint lacks weight-bearing stability and requires extensive bracing or assistive devices for ambulation.

Both severe ankylosis and flail joint dramatically impair mobility, requiring assistive devices such as canes, crutches, or walkers. Under DC 5250, the requirement for crutches due to a shortened or misaligned leg reaching 90% reflects profound whole-body impairment. For veterans with flail joints, extensive functional loss under 38 CFR 4.40 is inherent, as normal weight transfer, balance, and ambulation are mechanically compromised.

Establishing a claim under DC 5250 or 5254 requires clear objective evidence. X-rays or CT scans must confirm bony fusion, fibrous bridging, or absence of the hip articulation. The examiner must use a goniometer to document the exact angle of fixed flexion, abduction, adduction, and rotation. Orthopedic operative notes detailing previous arthrodesis or resection surgery are essential to verify anatomical status.