ICD-10 Code J33.9 – Nasal polyp, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J33.9 – Nasal polyp, unspecified
What it is
J33.9 identifies a nasal polyp when the record does not specify the type or cause. It refers to a benign growth in the nasal cavity or sinuses that is documented simply as unspecified.
Clinical signs
Common findings include nasal obstruction, reduced sense of smell, and persistent nasal discharge. Clinical features vary; refer to documentation if the note does not clearly describe the polyp or associated condition.
When to use this code
Use J33.9 when the clinician documents a nasal polyp but does not identify a more specific subtype. It also fits when the chart confirms a polyp in the nose or sinuses without further detail. If the record names a related condition or a more precise polyp diagnosis, code that instead.
Do not use for
Do not use J33.9 for allergic rhinitis, sinusitis, or other causes of nasal blockage unless a polyp is documented. Check documentation if the note describes a mass, cyst, or growth outside the nasal cavity.
Coding tip
Code the most specific nasal polyp diagnosis available, and use J33.9 only when the provider leaves it unspecified.