Acute petrositis, right ear

This code signifies an acute inflammatory process affecting the petrous apex of the temporal bone, specifically in the right ear. It often arises as a complication of otitis media, characterized by localized infection and potential bone erosion.

Apply this code when documentation clearly indicates an acute infection of the petrous portion of the right temporal bone. Supporting clinical findings may include deep ear pain, retro-orbital pain, diplopia (Gradenigo's syndrome), or facial nerve palsy, along with imaging evidence such as CT or MRI confirming petrositis.

• Ensure documentation specifies "acute" to differentiate from chronic petrositis.
• Verify laterality (right ear) is explicitly stated; do not assume.
• Look for associated conditions like otitis media, which may require additional coding.