ICD-10 Code H66 – Suppurative and unspecified otitis media (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H66 – Suppurative and unspecified otitis media
What it is
H66 identifies otitis media involving the middle ear, including suppurative forms and cases where the type is not specified. Use it when the record shows middle-ear infection or inflammation but does not support a more specific code.
Clinical signs
Common findings include ear pain, fever, irritability, and reduced hearing, but clinical features vary; refer to documentation. You may also see a bulging or inflamed tympanic membrane, ear drainage, or a history consistent with middle-ear infection.
When to use this code
Use H66 when the provider documents suppurative otitis media or simply otitis media without further detail. It is appropriate when laterality, acuity, or a more specific subtype is not documented. Check documentation if the note suggests a different ear disorder.
Do not use for
Do not use this code for otitis externa, serous otitis media, or ear symptoms without a diagnosis. If the record specifies a more precise otitis media type or site, code that condition instead.
Coding tip
Review the note for type, laterality, and acute or chronic status before defaulting to H66.