Chronic petrositis, right ear

This code signifies a persistent inflammatory process affecting the petrous apex of the temporal bone in the right ear. It indicates a long-standing infection or inflammation, often a complication of otitis media, that has extended into this specific bony structure.

Apply this code when documentation clearly states "chronic petrositis" affecting the right ear. Supporting clinical notes should detail symptoms such as persistent otalgia, facial nerve palsy, or diplopia, along with imaging findings (e.g., CT or MRI) confirming inflammation or erosion of the right petrous apex.

• Ensure the chronicity of the condition is explicitly stated in the physician's documentation.
• Verify laterality; this code is specific to the right ear.
• Consider sequencing this code after the underlying cause, such as chronic otitis media, if applicable.