ICD-10 Code J33 – Nasal polyp (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J33 – Nasal polyp
What it is
J33 identifies a nasal polyp, a benign growth from the lining of the nasal cavity or sinuses. It is used when documentation shows a polypoid lesion in the nose or paranasal sinuses.
Clinical signs
Common findings include nasal obstruction, reduced smell, and persistent nasal drainage. Clinical features vary; refer to documentation, especially when the record confirms visible polyps on exam or imaging.
When to use this code
Use J33 when the provider documents nasal polyps as the diagnosis or as the cause of symptoms. It can support coding for unilateral or bilateral polyp disease when the note does not specify a more detailed subtype.
Code the condition only when it is clearly documented, not for vague congestion or sinus complaints alone. If the chart mentions other nasal masses or chronic sinus disease without a polyp diagnosis, check documentation.
Do not use for
Do not use J33 for ordinary nasal congestion, allergic rhinitis, or unspecified sinusitis without a documented polyp. Check documentation if the lesion is described as a tumor, cyst, or other mass.
Coding tip
Verify that the provider explicitly documents a nasal polyp before assigning J33.