Patulous Eustachian tube, left ear

This code signifies an abnormal patency of the Eustachian tube in the left ear, meaning the tube remains open when it should be closed. This condition can lead to autophony (hearing one's own voice or breathing loudly), aural fullness, and fluctuating hearing loss. It is distinct from Eustachian tube dysfunction where the tube is typically obstructed.

Use this code when documentation specifically indicates a diagnosis of patulous Eustachian tube affecting the left ear. This diagnosis is often made based on patient symptoms, otoscopic findings (e.g., tympanic membrane movement with respiration), and sometimes nasal endoscopy. Ensure the laterality is clearly specified as "left ear."

• Always confirm laterality; separate codes exist for right, bilateral, and unspecified ears.
• Do not confuse with Eustachian tube obstruction (H68.0-), which presents with different symptoms and pathophysiology.
• Look for keywords like "patulous," "patent," or "abnormally open" in the physician's notes.