Anterior nasal diphtheria

This code describes a specific bacterial infection, diphtheria, localized to the anterior nasal passages. It is characterized by the formation of a pseudomembrane and inflammation primarily affecting the front part of the nose, caused by Corynebacterium diphtheriae.

Assign this code for confirmed cases of diphtheria where the infection is specifically documented as anterior nasal. Documentation should clearly indicate the anatomical site of the infection and a definitive diagnosis of diphtheria, often supported by laboratory confirmation.

• Ensure documentation specifies "anterior nasal" to differentiate from other forms of diphtheria (e.g., pharyngeal, laryngeal).
• Do not use for carrier states or exposure to diphtheria; specific codes exist for those scenarios.
• Consider sequencing with codes for any associated complications or systemic effects, if documented.