1. Home
  2. ICD-10-CM Codes List
  3. H60–H95
  4. H65-H75
  5. Other disorders of middle ear mastoid (H74)

Other disorders of middle ear mastoid (H74)

The ICD-10 code section H74 covers various disorders affecting the middle ear and mastoid, including tympanosclerosis, adhesive middle ear disease, and abnormalities or dislocations of the ear ossicles. These codes are essential for identifying specific conditions of the middle ear to ensure accurate diagnosis and treatment.

This classification is used for conditions such as tympanosclerosis, a hardening of the tissues in the middle ear often referred to by the same name, and adhesive middle ear disease, sometimes called adhesive otitis media. It also includes codes for disruptions in the ear ossicles, such as dislocations and ankylosis (stiffness or fixation), which impair sound conduction. Polyp formation in the middle ear and other specified or unspecified middle ear and mastoid disorders, including cholesterol granuloma, are also covered. Notably, these codes specify laterality (right, left, bilateral, or unspecified), which helps medical coders assign more precise diagnosis codes. Understanding the ICD-10 code for tympanosclerosis or adhesive otitis media, for example, aids clinicians and coders in differentiating these from other middle ear issues.

  • Diseases of the ear and mastoid process (H60–H95)

    • Diseases of middle ear and mastoid (H65-H75)

        • Other disorders of middle ear mastoid (H74)

        • H74 Other disorders of middle ear mastoid
        • H74.0 Tympanosclerosis
        • H74.01 Tympanosclerosis, right ear
        • H74.02 Tympanosclerosis, left ear
        • H74.03 Tympanosclerosis, bilateral
        • H74.09 Tympanosclerosis, unspecified ear
        • H74.1 Adhesive middle ear disease
        • 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 ossicles
        • 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 ossicles
        • H74.31 Ankylosis of ear ossicles
        • 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 ossicles
        • 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 ossicles
        • 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 ear
        • 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 mastoid
        • H74.8X Other specified disorders of middle ear and mastoid
        • 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 mastoid
        • 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

Instructional Notations

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

Clinical Terms

The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.

Tympanosclerosis

Calcification of the TYMPANIC MEMBRANE and MIDDLE EAR most often associated with chronic OTITIS MEDIA.