Longitudinal reduction defect of tibia, bilateral

This code describes a congenital malformation characterized by the partial or complete absence of the tibia in both lower limbs. It represents a significant developmental anomaly affecting the long bones of the leg, leading to limb length discrepancy and functional impairment.

Use this code when documentation clearly indicates a bilateral longitudinal reduction defect specifically involving the tibia, present at birth. This diagnosis is typically made through physical examination and confirmed by imaging studies such as X-rays or MRI.

• Ensure documentation specifies bilateral involvement; unilateral defects are coded differently.
• Distinguish from other lower limb reduction defects, such as those involving the fibula or femur.
• Code any associated malformations or syndromes separately, if documented.