ICD-10 Code J04.0 – Acute laryngitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J04.0 – Acute laryngitis
What it is
J04.0 identifies acute inflammation of the larynx, usually causing a sudden voice change. Use it when the record clearly documents acute laryngitis, not a chronic or unspecified throat condition.
Clinical signs
Typical findings include hoarseness, a weak or lost voice, and throat irritation. Clinical features vary; refer to documentation if the note also mentions cough, sore throat, or upper respiratory symptoms.
When to use this code
Use J04.0 when the provider diagnoses acute laryngitis in the assessment or final impression. It fits encounters where the laryngeal inflammation is the primary reason for the visit or a clearly documented active problem.
If the note only says “laryngitis” without acuity, check documentation before coding. Confirm whether the condition is acute, chronic, or part of a broader respiratory infection.
Do not use for
Do not use this code for chronic laryngitis, laryngitis due to a known alternate diagnosis, or vague throat irritation without a documented acute laryngeal diagnosis.
Coding tip
Code J04.0 only when “acute” is documented; if it is missing, verify the provider’s intent before assigning the code.