ICD-10 Code A36.2 – Laryngeal diphtheria (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A36.2 – Laryngeal diphtheria
What it is
Laryngeal diphtheria is a diphtheria infection that involves the larynx and upper airway. It can cause airway obstruction from inflammatory swelling and pseudomembrane formation.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include hoarseness, barking cough, stridor, and breathing difficulty, with evidence of laryngeal involvement from diphtheria.
When to use this code
Use A36.2 when the provider documents diphtheria affecting the larynx or laryngeal croup due to diphtheria. Code it when the diagnosis is confirmed or clearly stated in the record. Check documentation if the site of infection is not specified.
Do not use for
Do not use this code for non-diphtheritic croup, laryngitis, or other upper-airway infections without diphtheria. If the record only says “diphtheria” without laryngeal involvement, use the documented site or check documentation.
Coding tip
Confirm both the diphtheria diagnosis and the laryngeal site in the provider note before assigning A36.2.