Chronic atticoantral suppurative otitis media, left ear

This code describes a persistent, purulent infection of the middle ear, specifically involving the attic (epitympanum) and antrum, affecting the left ear. This chronic inflammatory process often leads to bone erosion and cholesteatoma formation.

Use this code when documentation clearly indicates a long-standing, suppurative otitis media localized to the atticoantral region of the left ear. This diagnosis is typically supported by otoscopic findings of a perforation in the pars flaccida or posterosuperior quadrant, purulent discharge, and often imaging evidence of bone erosion.

• Ensure documentation specifies "chronic" and the specific "atticoantral" involvement.
• Laterality (left ear) must be clearly documented; do not use for bilateral or unspecified ear involvement.
• Distinguish from acute otitis media or chronic tubotympanic suppurative otitis media, which have different ICD-10-CM codes.