Congenital bowing of tibia and fibula

This code signifies a birth defect characterized by an abnormal curvature or bending of both the tibia (shin bone) and fibula (calf bone) present at birth. This bowing can affect one or both lower legs and may be associated with other skeletal anomalies or syndromes.

Use this code when documentation clearly indicates a congenital malformation involving the bowing of both the tibia and fibula. This diagnosis is typically made at birth or early infancy based on physical examination and imaging studies such as X-rays.

• Distinguish from acquired bowing deformities, which would be coded differently.
• Specify laterality (left, right, bilateral) if documented, using appropriate seventh characters or laterality codes if available for the specific encounter.
• Look for associated congenital anomalies or syndromes that may require additional coding.