ICD-10 Code J33.0 – Polyp of nasal cavity (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J33.0 – Polyp of nasal cavity
What it is
J33.0 identifies a polyp located in the nasal cavity. It is used when documentation shows a benign growth arising from the nasal lining.
Clinical signs
Common findings include nasal obstruction, reduced sense of smell, and persistent nasal discharge. Clinical features vary; refer to documentation.
When to use this code
Use J33.0 when the provider documents a nasal cavity polyp, including a single or multiple polypoid lesion in the nose. You should code it when the diagnosis is confirmed in the note or report. If the record only says “nasal mass” or “sinus disease,” check documentation before assigning this code.
Do not use for
Do not use this code for polyps in sites other than the nasal cavity, such as the sinuses or larynx. Do not assign it when the chart does not clearly identify a nasal polyp.
Coding tip
Confirm the anatomic site in the provider note; “nasal polyp” supports J33.0, but vague wording may require clarification.