Otosclerosis involving oval window, obliterative, right ear

This code describes a condition where abnormal bone growth in the right ear's middle ear progressively hardens and completely obstructs the oval window. This obliterative otosclerosis prevents the stapes bone from vibrating properly, leading to conductive hearing loss.

Use this code for patients diagnosed with otosclerosis specifically affecting and completely closing off the oval window in the right ear. Documentation should clearly state the laterality (right ear) and the obliterative nature of the otosclerosis, often confirmed by audiometry and imaging.

• Ensure documentation specifies "obliterative" to differentiate from non-obliterative forms of otosclerosis.
• Verify laterality (right ear) is clearly documented; separate codes exist for left and bilateral involvement.
• Consider sequencing with codes for associated hearing loss (e.g., H90.0x for conductive hearing loss).