1. H74 Other disorders of middle ear mastoid

    Excludes2

    • mastoiditis (H70.-)
    1. H74.0 Tympanosclerosis

      1. H74.01 Tympanosclerosis, right ear

      2. H74.02 Tympanosclerosis, left ear

      3. H74.03 Tympanosclerosis, bilateral

      4. H74.09 Tympanosclerosis, unspecified ear

    2. H74.1 Adhesive middle ear disease

      Inclusion term(s):

      • Adhesive otitis
      1. H74.11 Adhesive right middle ear disease

      2. H74.12 Adhesive left middle ear disease

      3. H74.13 Adhesive middle ear disease, bilateral

      4. H74.19 Adhesive middle ear disease, unspecified ear

    3. H74.2 Discontinuity and dislocation of ear ossicles

      1. H74.20 Discontinuity and dislocation of ear ossicles, unspecified ear

      2. H74.21 Discontinuity and dislocation of right ear ossicles

      3. H74.22 Discontinuity and dislocation of left ear ossicles

      4. H74.23 Discontinuity and dislocation of ear ossicles, bilateral

    4. H74.3 Other acquired abnormalities of ear ossicles

      1. 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
      2. 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
      3. 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
    5. H74.4 Polyp of middle ear

      1. H74.40 Polyp of middle ear, unspecified ear

      2. H74.41 Polyp of right middle ear

      3. H74.42 Polyp of left middle ear

      4. H74.43 Polyp of middle ear, bilateral

    6. H74.8 Other specified disorders of middle ear and mastoid

      1. 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
    7. H74.9 Unspecified disorder of middle ear and mastoid

      1. H74.90 Unspecified disorder of middle ear and mastoid, unspecified ear

      2. H74.91 Unspecified disorder of right middle ear and mastoid

      3. H74.92 Unspecified disorder of left middle ear and mastoid

      4. H74.93 Unspecified disorder of middle ear and mastoid, bilateral

Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.