ICD-10 Code J38.4 – Edema of larynx (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J38.4 – Edema of larynx
What it is
J38.4 identifies swelling of the larynx, the voice box in the throat. Use it when documentation states laryngeal edema or edema of the larynx.
Clinical signs
Typical findings include hoarseness, throat discomfort, and breathing difficulty from airway narrowing. Clinical features vary; refer to documentation.
When to use this code
Use J38.4 when the provider documents edema affecting the larynx as the diagnosis. It may apply in acute or nonacute settings when the swelling is the reason for evaluation or treatment. Code only what is clearly stated in the record.
Do not use for
Do not use this code for generalized edema, pharyngeal swelling, or unspecified throat symptoms without laryngeal involvement. Check documentation.
Coding tip
Look for explicit mention of “laryngeal edema” or “edema of larynx” before assigning J38.4.