Cyst and mucocele of nose and nasal sinus

This code signifies the presence of a fluid-filled sac (cyst) or a mucus-filled retention cyst (mucocele) within the nasal cavity or paranasal sinuses. These lesions can arise from obstructed glandular ducts or developmental anomalies, potentially causing symptoms such as nasal obstruction, facial pain, or headache.

Apply this code when documentation explicitly identifies a cyst or mucocele originating in the nose or any of the paranasal sinuses (e.g., maxillary, frontal, ethmoid, sphenoid). Supporting documentation includes imaging reports (CT, MRI) confirming the lesion, endoscopic findings, or operative reports detailing its removal.

• Differentiate from polyps (J33.-) or other benign neoplasms of the nasal cavity/sinuses, which have distinct codes.
• Ensure the documentation specifies "cyst" or "mucocele" and its location within the nose or nasal sinus.
• Do not use for cysts or mucoceles of the oral cavity or other head and neck sites; those have separate classifications.