Polypoid sinus degeneration

This code describes a non-neoplastic, inflammatory condition of the paranasal sinuses characterized by edematous mucosal thickening that resembles polyps. It represents a degenerative change within the sinus lining, often associated with chronic inflammation or allergic processes, without true polyp formation.

Use this code when documentation specifies "polypoid degeneration" or "polypoid changes" within a sinus, indicating mucosal thickening that is not a discrete polyp. This is typically found during imaging studies (e.g., CT scan) or endoscopic examination. Ensure the documentation clearly differentiates this from true nasal polyps.

• Do not confuse with codes for true nasal polyps (e.g., 471.0, 471.9). Polypoid degeneration is a diffuse mucosal change, not a distinct growth.
• Look for terms like "mucosal thickening," "edematous mucosa," or "polypoid appearance" without explicit mention of "polyp."
• Consider coding any underlying conditions contributing to the sinus degeneration, such as chronic sinusitis (e.g., 473.x).