ICD-10 Code H66.9 – Otitis media, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H66.9 – Otitis media, unspecified
What it is
H66.9 identifies otitis media when the provider documents middle ear inflammation or infection but does not specify the type, laterality, or acuity. Use it when the record simply states otitis media without further detail.
Clinical signs
Typical findings may include ear pain, fever, irritability, or a bulging, erythematous tympanic membrane. Clinical features vary; refer to documentation.
When to use this code
Use this code when the note confirms otitis media but does not distinguish acute, chronic, serous, or suppurative disease. It also fits when laterality is not documented and no more specific code is supported. Check documentation before assigning a broader code.
Do not use for
Do not use H66.9 if the record clearly identifies a more specific otitis media type or ear laterality. Do not use it for external ear infection or nonspecific ear pain alone.
Coding tip
If the provider’s wording is vague, query for acuity and laterality before defaulting to H66.9.