Otosclerosis involving oval window, nonobliterative, bi

This code describes otosclerosis, a condition characterized by abnormal bone growth in the middle ear, specifically affecting the oval window. In this nonobliterative form, the stapes footplate is fixated but not completely overgrown, leading to conductive hearing loss in both ears.

Apply this code when documentation confirms bilateral otosclerosis with involvement of the oval window, and the condition is explicitly stated as nonobliterative. This typically presents with progressive conductive hearing loss in both ears, often confirmed by audiometry and otoscopic examination.

• Ensure documentation specifies "nonobliterative" and "bilateral" involvement of the oval window.
• Distinguish from obliterative otosclerosis (H80.1-) where the oval window is completely overgrown.
• Consider sequencing with codes for associated hearing loss (e.g., H90.0) if documented.