Other polyp of sinus

This code represents the presence of a benign, often pedunculated or sessile, growth originating from the mucosal lining of a paranasal sinus, excluding those specifically identified as nasal polyps (J33.0) or other specified types. These polyps are typically inflammatory in nature but can also be neoplastic.

Use this code when documentation specifies a polyp located within a paranasal sinus (e.g., maxillary, ethmoid, sphenoid, frontal) that is not explicitly identified as a nasal polyp or a specific type of polyp with its own unique code. Supporting documentation should clearly indicate the sinus location and the benign nature of the growth.

• Differentiate from J33.0 (Nasal polyp) which refers to polyps originating from the nasal cavity or ostia.
• Ensure the documentation specifies the sinus involved; if not, query the provider for clarification.
• If the polyp is identified as neoplastic, refer to the Neoplasm section of the ICD-10-CM codebook for appropriate coding.