Acute mastoiditis without complications, bilateral

This code signifies an acute inflammatory process affecting the mastoid air cells, located behind the ear, occurring in both ears. It indicates that the infection has not spread beyond the mastoid bone to cause further issues like abscess formation, facial nerve paralysis, or intracranial complications.

Apply this code when documentation explicitly states acute mastoiditis affecting both ears, and there is no mention of any associated complications. This typically occurs in the context of an acute otitis media that has spread to the mastoid bone. Physician documentation should clearly specify "bilateral" involvement and confirm the absence of complications.

• Ensure the documentation specifies "acute" and "bilateral" involvement.
• Do not use this code if any complications (e.g., subperiosteal abscess, facial paralysis, intracranial extension) are noted; instead, select a more specific code from the H70.0- series.
• Always review the laterality (left, right, bilateral, unspecified) carefully to ensure the correct code is chosen.