Longitudinal reduction defect of fibula, bilateral

This code describes a congenital anomaly characterized by the partial or complete absence of the fibula in both lower limbs. This malformation results in limb length discrepancy, foot deformities, and instability of the ankle joint. It is a developmental defect occurring during fetal growth.

Use this code for patients diagnosed with bilateral fibular hemimelia or aplasia, confirmed through imaging studies such as X-rays or MRI. Documentation should clearly state the bilateral nature of the fibular reduction defect. This code is appropriate for initial diagnosis and subsequent encounters related to the management of this congenital condition.

• Ensure documentation explicitly states "bilateral" to support the use of this specific code.
• Do not confuse with unilateral fibular reduction defects, which are coded separately based on laterality.
• Consider additional codes for associated conditions such as foot deformities (e.g., talipes equinovarus) or limb length discrepancies.