ICD-10-CM > H60-H95 > H65-H75 > H65 > H65.2 H65.2 Chronic serous otitis media Non-Billable/Non-Specific Applicable To Chronic tubotympanal catarrh Codes H65.20Chronic serous otitis media, unspecified earH65.21Chronic serous otitis media, right earH65.22Chronic serous otitis media, left earH65.23Chronic serous otitis media, bilateral