Anomalies of interarch distance

This code signifies a discrepancy in the measurement between the maxillary and mandibular dental arches, specifically referring to an abnormal interarch distance. This anomaly can manifest as either an excessive or insufficient space between the arches, impacting occlusion and overall dental alignment.

Use this code when documentation indicates a diagnosed anomaly in the interarch distance, such as a significant overjet, underbite, or crossbite directly attributed to an abnormal arch relationship. Supporting documentation should include clinical measurements, orthodontic assessments, or dental imaging confirming the interarch discrepancy.

• Ensure documentation specifies "anomalies of interarch distance" rather than just a general malocclusion.
• Do not confuse this with codes for specific malocclusions (e.g., M26.21-M26.24) unless the underlying cause is explicitly an interarch distance anomaly.
• Consider sequencing this code with other codes describing the specific type of malocclusion (e.g., M26.21 for Angle's Class I) if both are documented and clinically relevant.