Longitudinal reduction defect of left fibula

This code describes a congenital malformation characterized by the partial or complete absence of the fibula bone in the left lower leg. It is a type of limb reduction defect where the long axis of the limb is affected, specifically involving the fibula. This condition can range from mild hypoplasia to complete aplasia of the left fibula.

Use this code for patients diagnosed with a congenital absence or significant underdevelopment of the left fibula. Documentation should clearly state the laterality (left) and specify the fibula as the affected bone, often noted during prenatal imaging or at birth. This code is appropriate when the defect is longitudinal, meaning along the length of the bone.

• Ensure documentation specifies "left" fibula; separate codes exist for the right and unspecified sides.
• Differentiate from transverse reduction defects, which involve the entire limb segment rather than a specific bone.
• Code any associated malformations or syndromes separately, as this code only describes the fibular defect.