Macrogenia

This code describes an abnormally large or prominent chin. It is a congenital or developmental anomaly characterized by an excessive projection of the mandible, often resulting in a disproportionate facial profile. Macrogenia can affect dental occlusion and overall facial aesthetics.

Use this code when documentation clearly indicates an abnormally large chin. This diagnosis is typically made through clinical examination and may be supported by imaging studies such as cephalometric radiographs or CT scans that demonstrate mandibular overgrowth. It is often identified during orthodontic or maxillofacial evaluations.

• Differentiate from prognathism (M26.21-), which refers to a protruding jaw, not specifically the chin.
• Ensure documentation specifies "macrogenia" or "large chin" rather than general terms like "prominent jaw."
• Consider co-reporting with codes for associated malocclusions (e.g., M26.2- series) or other dentofacial anomalies if present.