ICD-10 Code H66.22 – Chronic atticoantral suppurative otitis media, left ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H66.22 – Chronic atticoantral suppurative otitis media, left ear
What it is
This code identifies chronic suppurative infection of the middle ear with attic and antral involvement in the left ear. It reflects a long-standing ear disease, not an acute ear infection.
Clinical signs
Typical findings include persistent or recurrent ear discharge, hearing loss, and evidence of chronic middle ear disease. Clinical features vary; refer to documentation for attic or antral involvement and left-sided laterality.
When to use this code
Use H66.22 when the record clearly documents chronic atticoantral suppurative otitis media affecting the left ear. This is appropriate for chronic drainage, perforation, or longstanding middle ear disease described by the clinician.
Choose this code when laterality is specified as left. If the note only says chronic otitis media without atticoantral or suppurative detail, check documentation before coding.
Do not use for
Do not use this code for acute otitis media, nonsuppurative otitis media, or chronic ear disease without suppuration. Also avoid it when the record does not specify the left ear.
Coding tip
Verify both the chronic suppurative nature and the left-ear laterality in the provider note before assigning H66.22.