ICD-10 Code J04.30 – Supraglottitis, unspecified, without obstruction (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J04.30 – Supraglottitis, unspecified, without obstruction
What it is
J04.30 identifies supraglottitis when the provider does not specify the cause and there is no airway obstruction. It refers to inflammation of the supraglottic structures above the vocal cords.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include sore throat, painful swallowing, muffled voice, drooling, and visible swelling of the supraglottic area.
When to use this code
Use this code when the record documents supraglottitis without further detail and specifically states there is no obstruction. It is appropriate for confirmed inflammation of the supraglottic region, not for nonspecific throat pain alone. If the note mentions a cause or complication, code that documented condition instead.
Do not use for
Do not use J04.30 for supraglottitis with airway obstruction, since that requires a different code. Also avoid it when the documentation only supports laryngitis, pharyngitis, or another upper-airway infection.
Coding tip
Check the note for the words “without obstruction” and for any documented etiology before assigning J04.30.