ICD-10 Code H65.0 – Acute serous otitis media (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H65.0 – Acute serous otitis media
What it is
H65.0 identifies acute serous otitis media, a short-term middle ear effusion without evidence of acute bacterial infection. You use it when the record describes fluid behind the eardrum with an acute presentation.
Clinical signs
Typical findings include ear fullness, reduced hearing, and a visible middle ear effusion on otoscopy. Clinical features vary; refer to documentation if the note does not clearly distinguish serous otitis media from other ear infections.
When to use this code
Use H65.0 when the provider documents acute serous otitis media, acute otitis media with effusion, or similar wording for a new middle ear fluid collection. Code it when the condition is specifically identified and no purulent infection is documented.
If the note only says ear pain, congestion, or nonspecific otitis media, check documentation before assigning this code. The diagnosis should support a noninfective effusion rather than a suppurative ear infection.
Do not use for
Do not use H65.0 for chronic serous otitis media or for acute suppurative otitis media. Check documentation if the record describes perforation, drainage, or another ear disorder instead.
Coding tip
Confirm that the provider documents both the acute nature and the serous effusion before selecting H65.0.