ICD-10 Code H65.112 – Acute and subacute allergic otitis media (mucoid) (sanguinous) (serous), left ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H65.112 – Acute and subacute allergic otitis media (mucoid) (sanguinous) (serous), left ear
What it is
This code identifies allergic otitis media affecting the left ear, with acute or subacute inflammation and a nonpurulent middle-ear effusion. Use it when documentation specifies mucoid, sanguinous, or serous fluid in the left ear.
Clinical signs
Typical findings include middle-ear effusion, ear fullness, hearing reduction, and a history suggestive of allergic or eustachian tube dysfunction. Clinical features vary; refer to documentation.
When to use this code
Use H65.112 when the provider documents acute or subacute allergic otitis media specifically in the left ear. It also fits when the record names serous, mucoid, or sanguinous middle-ear fluid and clearly localizes the condition to the left side.
Do not use for
Do not use this code for unspecified ear laterality, chronic otitis media, or suppurative infection. If the note does not confirm allergic otitis media or left-ear involvement, check documentation.
Coding tip
Always confirm both laterality and the acute/subacute allergic description before assigning H65.112.