Longitudinal reduction defect of ulna, bilateral

This code signifies a congenital malformation characterized by the partial or complete absence of the ulna bone in both forearms. This bilateral defect results in significant forearm and hand deformities, often accompanied by radial deviation of the wrist.

Apply this code when documentation clearly indicates a congenital absence or hypoplasia of the ulna affecting both the left and right upper limbs. This diagnosis is typically made at birth or early childhood based on physical examination and imaging studies.

• Ensure documentation specifies bilateral involvement; separate codes exist for unilateral defects.
• Look for associated anomalies, such as radial head dislocation or hand malformations, and code them separately if present.
• Do not confuse with radial longitudinal deficiency, which involves the radius.