Chronic inflammation of postmastoidectomy cavity, unsp ear

This code describes persistent inflammation within the space created in the mastoid bone following a mastoidectomy, without specifying the affected ear. This chronic inflammatory process can involve the lining of the cavity and may be associated with discharge, pain, or hearing loss.

Use this code when documentation clearly indicates chronic inflammation of a post-surgical mastoid cavity, and the laterality (left or right ear) is not specified. This typically occurs in patients with a history of mastoidectomy presenting with ongoing symptoms related to the cavity.

• Ensure documentation specifies "chronic" inflammation; acute inflammation would be coded differently.
• Verify if laterality is documented (e.g., right, left, bilateral) to use a more specific code if available.
• Consider co-morbid conditions such as cholesteatoma or otorrhea, which may require additional codes.