Exostosis of external canal, bilateral

This code signifies the presence of benign bony growths (osteomas) within the external auditory canals of both ears. These exostoses are typically slow-growing and can narrow the ear canal, potentially leading to cerumen impaction or conductive hearing loss.

Apply this code when documentation explicitly states "exostosis of external canal, bilateral" or "bilateral surfer's ear." This diagnosis is often made during otoscopic examination and may be confirmed with imaging studies if necessary.

• Ensure documentation specifies bilateral involvement; otherwise, use the appropriate unilateral code.
• Do not confuse with other external ear canal disorders like otitis externa or foreign body.
• Consider sequencing with codes for associated conditions such as conductive hearing loss (H90.0x) or cerumen impaction (H61.2x).