Other disorders of middle ear mastoid (H74) ICD-10-CM
The H74 code range covers other disorders of middle ear mastoid with 48 ICD-10-CM diagnosis codes. 36 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
- mastoiditis H70
Codes in the H74 Range 48 codes · 36 billable
- H74 Other disorders of middle ear mastoidNon-billable
- H74.0 TympanosclerosisNon-billable
- H74.01 Tympanosclerosis, right ear
- H74.02 Tympanosclerosis, left ear
- H74.03 Tympanosclerosis, bilateral
- H74.09 Tympanosclerosis, unspecified ear
- H74.1 Adhesive middle ear diseaseNon-billable
- H74.11 Adhesive right middle ear disease
- H74.12 Adhesive left middle ear disease
- H74.13 Adhesive middle ear disease, bilateral
- H74.19 Adhesive middle ear disease, unspecified ear
- H74.2 Discontinuity and dislocation of ear ossiclesNon-billable
- H74.20 Discontinuity and dislocation of ear ossicles, unspecified ear
- H74.21 Discontinuity and dislocation of right ear ossicles
- H74.22 Discontinuity and dislocation of left ear ossicles
- H74.23 Discontinuity and dislocation of ear ossicles, bilateral
- H74.3 Other acquired abnormalities of ear ossiclesNon-billable
- H74.31 Ankylosis of ear ossiclesNon-billable
- H74.311 Ankylosis of ear ossicles, right ear
- H74.312 Ankylosis of ear ossicles, left ear
- H74.313 Ankylosis of ear ossicles, bilateral
- H74.319 Ankylosis of ear ossicles, unspecified ear
- H74.32 Partial loss of ear ossiclesNon-billable
- H74.321 Partial loss of ear ossicles, right ear
- H74.322 Partial loss of ear ossicles, left ear
- H74.323 Partial loss of ear ossicles, bilateral
- H74.329 Partial loss of ear ossicles, unspecified ear
- H74.39 Other acquired abnormalities of ear ossiclesNon-billable
- H74.391 Other acquired abnormalities of right ear ossicles
- H74.392 Other acquired abnormalities of left ear ossicles
- H74.393 Other acquired abnormalities of ear ossicles, bilateral
- H74.399 Other acquired abnormalities of ear ossicles, unspecified ear
- H74.4 Polyp of middle earNon-billable
- H74.40 Polyp of middle ear, unspecified ear
- H74.41 Polyp of right middle ear
- H74.42 Polyp of left middle ear
- H74.43 Polyp of middle ear, bilateral
- H74.8 Other specified disorders of middle ear and mastoidNon-billable
- H74.8X Other specified disorders of middle ear and mastoidNon-billable
- H74.8X1 Other specified disorders of right middle ear and mastoid
- H74.8X2 Other specified disorders of left middle ear and mastoid
- H74.8X3 Other specified disorders of middle ear and mastoid, bilateral
- H74.8X9 Other specified disorders of middle ear and mastoid, unspecified ear
- H74.9 Unspecified disorder of middle ear and mastoidNon-billable
- H74.90 Unspecified disorder of middle ear and mastoid, unspecified ear
- H74.91 Unspecified disorder of right middle ear and mastoid
- H74.92 Unspecified disorder of left middle ear and mastoid
- H74.93 Unspecified disorder of middle ear and mastoid, bilateral
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the H74 range.
Middle Ear Polyp
A non-neoplastic or neoplastic polypoid growth in the middle ear.
Tympanosclerosis
Calcification of the TYMPANIC MEMBRANE and MIDDLE EAR most often associated with chronic OTITIS MEDIA.
About the H74 Code Range
These disorders affect the middle ear, the mastoid, or the small ear bones called ossicles.
The main branches separate tympanosclerosis, adhesive middle ear disease, displaced or disconnected ossicles, other acquired ossicle abnormalities, and middle ear polyps. H74.3 further separates ossicle abnormalities into ankylosis, partial loss, and other acquired abnormalities. H74.8 covers other specified middle ear and mastoid disorders, while H74.9 covers unspecified disorders. Subdivisions identify the right ear, left ear, both ears, or an unspecified ear.
Questions About This Page
How many billable codes are in the H74 range?
Of the 48 codes in this range, 36 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the H74 range classify?
The range classifies other disorders of middle ear mastoid. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
