ICD-10 Code J33.8 – Other polyp of sinus (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J33.8 – Other polyp of sinus
What it is
J33.8 identifies a polyp in the sinus that is not classified elsewhere. It is used when documentation specifies an other sinus polyp rather than a more specific nasal or sinus polyp type.
Clinical signs
Clinical features vary; refer to documentation. Commonly noted findings include chronic nasal obstruction, reduced airflow, or imaging and endoscopic evidence of a polypoid sinus lesion.
When to use this code
Use J33.8 when the provider documents an other polyp of the sinus and no more specific polyp code applies. It may be supported by ENT examination, endoscopy, or imaging describing a sinus polyp. If the record only says “nasal polyp,” check whether a different code is more appropriate.
Do not use for
Do not use this code for unspecified nasal polyps or for polyps clearly documented in another site or category. Check documentation if the record does not clearly identify the sinus as the source.
Coding tip
Match the code to the documented anatomic site and wording; if the note is vague, query for clarification before assigning J33.8.