ICD-10 Code J04.3 – Supraglottitis, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J04.3 – Supraglottitis, unspecified
What it is
J04.3 identifies inflammation of the supraglottic structures of the larynx without a more specific cause or site. Use it when documentation states supraglottitis but does not specify organism, severity, or associated epiglottitis.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include sore throat, painful swallowing, muffled voice, and airway symptoms involving the supraglottic area.
When to use this code
Use this code when the provider documents supraglottitis and does not name a more specific diagnosis. It may also fit when the record describes supraglottic inflammation but does not clearly support epiglottitis or another coded condition. Check documentation if the term is ambiguous.
Do not use for
Do not use J04.3 if the record clearly documents epiglottitis, laryngitis, or another more specific upper-airway disorder. Do not code from symptoms alone when supraglottitis is not explicitly stated.
Coding tip
If the note says “supraglottitis” without detail, code J04.3 and query only when a more specific diagnosis is clinically supported.