Longitudinal reduction defect of left femur

This code signifies a congenital anomaly characterized by the partial or complete absence of the left femur along its longitudinal axis. This defect can range from mild hypoplasia to complete agenesis of the bone, impacting the overall length and function of the limb. It is a birth defect affecting skeletal development.

Use this code when documentation clearly indicates a congenital longitudinal reduction defect specifically affecting the left femur. This diagnosis is typically made at birth or early childhood based on physical examination and imaging studies such as X-rays or MRI. Documentation should specify the affected limb and the nature of the femoral defect.

• Ensure the documentation explicitly states "left femur" to differentiate from the right or unspecified side.
• Do not confuse with transverse reduction defects, which involve a complete absence of the distal part of the limb.
• Consider additional codes for associated anomalies or functional impairments, such as limb length discrepancy (M21.622) or congenital dislocation of the hip, if present.