ICD-10 Code H66.3X2 – Other chronic suppurative otitis media, left ear (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code H66.3X2 – Other chronic suppurative otitis media, left ear
What it is
This code identifies chronic suppurative otitis media affecting the left ear, with ongoing ear drainage through the middle ear. Use it when documentation specifies the left side and a chronic suppurative process.
Clinical signs
Common findings include persistent or recurrent otorrhea, a history of chronic ear infection, and evidence of middle ear inflammation. Clinical features vary; refer to documentation.
When to use this code
Use H66.3X2 when the record clearly states other chronic suppurative otitis media in the left ear. It fits outpatient, inpatient, or specialist notes that document chronic drainage or a chronic suppurative middle ear infection. Check documentation if laterality or chronicity is unclear.
Do not use for
Do not use this code for acute otitis media, nonsuppurative otitis media, or unspecified ear laterality. If the note does not confirm chronic suppurative disease, check documentation.
Coding tip
Confirm both chronic suppurative wording and left-ear laterality before assigning H66.3X2.