Nasopharyngeal diphtheria

This code identifies an acute bacterial infection caused by Corynebacterium diphtheriae specifically affecting the nasopharynx. It is characterized by the formation of a pseudomembrane in the nasal passages and pharynx, which can lead to airway obstruction and systemic toxin effects.

Assign this code when documentation explicitly states a diagnosis of nasopharyngeal diphtheria. This diagnosis is typically confirmed by bacterial culture from a nasopharyngeal swab. Use this code when the primary site of infection is clearly indicated as the nasopharynx, distinguishing it from other anatomical sites of diphtheria.

• Differentiate from other forms of diphtheria, such as laryngeal or cutaneous, which have distinct codes.
• Ensure documentation specifies the anatomical site as nasopharyngeal; otherwise, an unspecified diphtheria code may be more appropriate.
• Consider additional codes for any associated complications, such as myocarditis or polyneuropathy, if documented.