Longitudinal reduction defect of right ulna

This code describes a congenital anomaly characterized by the partial or complete absence of the right ulna, resulting in a shortened or malformed forearm. It is a type of limb reduction defect affecting the longitudinal development of the bone. This condition can impact the function and appearance of the right upper extremity.

Use this code when documentation clearly indicates a congenital absence or significant underdevelopment of the right ulna. This diagnosis is typically made at birth or early childhood based on physical examination and imaging studies such as X-rays. The medical record should specify the laterality (right) and the bone affected (ulna).

• Ensure the documentation specifies "right" ulna; separate codes exist for the left or unspecified side.
• Distinguish from transverse reduction defects, which involve the entire limb segment rather than a specific bone.
• Look for associated anomalies or syndromes, as these may require additional coding.