Diseases of middle ear and mastoid (H65-H75) ICD-10-CM
The H65–H75 section covers diseases of middle ear and mastoid with 380 ICD-10-CM diagnosis codes, of which 288 are billable in fiscal year 2027. The section is organized into the 11 code ranges listed below.
Code Ranges in This Section 11 ranges · 380 codes
The info icon previews the code ranges inside each row and its instructional notations from the official Tabular List.
About the H65–H75 Code Range
Middle ear inflammation and disorders of the mastoid process appear here alongside Eustachian tube problems and changes to the eardrum.
The middle ear inflammation categories separate nonsuppurative forms in H65 from suppurative and unspecified forms in H66. Their subdivisions distinguish acute from chronic conditions and, in some cases, serous from mucoid forms. H67 identifies middle ear inflammation in diseases classified elsewhere and separates codes by ear.
H68 separates Eustachian tube inflammation from obstruction; H69 contains other Eustachian tube disorders. H70 includes acute and chronic mastoiditis. H71 organizes cholesteatoma by location or diffuse involvement. A cholesteatoma is a buildup of keratin and cells from growing tissue in the middle ear.
H72 separates eardrum perforations by location, while H73 includes eardrum inflammation and other disorders. H74 includes disorders of the middle ear and mastoid, including changes to the small ear bones. H75 identifies middle ear and mastoid disorders in diseases classified elsewhere.
Questions About This Page
How many codes are in the H65-H75 range?
The H65-H75 range contains 380 ICD-10-CM diagnosis codes in FY 2027. 288 of them are billable, and the rest are category headers that organize the section.
What conditions does H65-H75 cover?
The range covers diseases of middle ear and mastoid. The code ranges listed above break it into groups of related conditions, and each one links to its own page with the full code list.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
