Pharyngeal diphtheria

This code identifies diphtheria specifically affecting the pharynx, characterized by the formation of a pseudomembrane in the throat, which can lead to airway obstruction and systemic toxicity. It represents an acute bacterial infection caused by Corynebacterium diphtheriae.

Apply this code when documentation confirms a diagnosis of diphtheria with the primary site of infection located in the pharynx. This typically involves findings such as a gray-white pseudomembrane on the tonsils, uvula, or soft palate, often accompanied by sore throat, fever, and cervical lymphadenopathy.

• Ensure documentation clearly specifies the pharynx as the affected site; otherwise, an unspecified diphtheria code may be more appropriate.
• Do not confuse with other forms of diphtheria (e.g., cutaneous, laryngeal) which have distinct codes.
• Code any associated complications, such as myocarditis or polyneuropathy, separately.