H74.91

What This Code Means

This code describes an unspecified problem or disease affecting the right middle ear and the mastoid bone (the bone behind the ear) when the specific condition cannot be identified or documented. It is used when a patient has symptoms or findings related to these structures but the exact diagnosis is unclear.

Coding Tips

• •Use this code only when the specific middle ear or mastoid disorder cannot be determined; always attempt to obtain more specific documentation from the provider before defaulting to this unspecified code
• •Verify laterality is correct (right side); if the condition affects the left ear or is bilateral, use the appropriate H74.92 or H74.93 code instead