ICD-10 Code H66.23 – Chronic atticoantral suppurative otitis media, bilateral (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H66.23 – Chronic atticoantral suppurative otitis media, bilateral
What it is
This code identifies chronic suppurative middle ear infection affecting both ears, with atticoantral involvement. It usually reflects long-standing disease with persistent or recurrent drainage.
Clinical signs
Common findings include chronic otorrhea, hearing loss, and tympanic membrane perforation or attic disease. Clinical features vary; refer to documentation.
When to use this code
Use H66.23 when the record clearly documents chronic atticoantral suppurative otitis media in both ears. It fits bilateral disease with chronic infection of the middle ear and mastoid-related structures. Confirm laterality and chronicity in the note before assigning the code.
Do not use for
Do not use this code for acute otitis media, nonsuppurative otitis media, or disease documented as unilateral. If the chart does not specify atticoantral involvement or bilateral disease, check documentation.
Coding tip
Verify both chronic suppuration and bilateral laterality; if either is missing, the code may be incorrect.