2022 ICD-10-CM Diagnosis Code H66.90

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2026

  1. ICD-10-CM Codes
    2. ›
  2. H60-H95
    3. ›
  3. H65-H75
    4. ›
  4. H66-
    5. ›
  5. 2026 ICD-10-CM Diagnosis Code H66.90
2026 ICD-10-CM Diagnosis Code H66.90

Otitis media, unspecified, unspecified ear

    2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 Billable/Specific Code
  • H66.90 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2026 edition of ICD-10-CM H66.90 became effective on October 1, 2025.
  • This is the American ICD-10-CM version of H66.90 - other international versions of ICD-10 H66.90 may differ.
The following code(s) above H66.90 contain annotation back-referencesAnnotation Back-ReferencesIn this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to H66.90:
  • H60-H95 2026 ICD-10-CM Range H60-H95

    Diseases of the ear and mastoid processNote
    • Use an external cause code following the code for the ear condition, if applicable, to identify the cause of the ear condition
    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the ear and mastoid process

  • H66 ICD-10-CM Diagnosis Code H66

    Suppurative and unspecified otitis media

      2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 Non-Billable/Non-Specific Code
    Includes
    • suppurative and unspecified otitis media with myringitis
    Use Additional
    • code to identify:
    • exposure to environmental tobacco smoke (Z77.22)
    • exposure to tobacco smoke in the perinatal period (P96.81)
    • history of tobacco dependence (Z87.891)
    • occupational exposure to environmental tobacco smoke (Z57.31)
    • tobacco dependence (F17.-)
    • tobacco use (Z72.0)
    Suppurative and unspecified otitis media
  • H66.9 ICD-10-CM Diagnosis Code H66.9

    Otitis media, unspecified

      2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 Non-Billable/Non-Specific Code
    Applicable To
    • Otitis media NOS
    • Acute otitis media NOS
    • Chronic otitis media NOS
    Use Additional
    • code for any associated perforated tympanic membrane (H72.-)
    Otitis media, unspecified
Approximate Synonyms
  • Acute otitis media
  • Acute otitis media (middle ear infection)
  • Acute persistent otitis media
  • Chronic otitis media
  • Chronic otitis media after insertion of tympanic ventilation tube
  • Influenza a with otitis media
  • Otitis media
  • Otitis media (middle ear infection)
  • Otitis media (middle ear infection) , after pe tubes
  • Otitis media (middle ear infection) , persistent
  • Otitis media (middle ear infection), chronic
  • Otitis media (middle ear infection), ear drum rupture
  • Otitis media (middle ear infection), multiple episodes
  • Otitis media due to influenza a
  • Perforation of tympanic membrane due to otitis media
  • Recurrent acute otitis media
Clinical Information
  • A disorder characterized by inflammation (physiologic response to irritation), swelling and redness to the middle ear.
  • An acute or chronic inflammatory process affecting the middle ear.
  • Inflammation of the middle ear including the auditory ossicles and the eustachian tube.
  • Inflammation of the middle ear.
ICD-10-CM H66.90 is grouped within Diagnostic Related Group(s) (MS-DRG v43.0):
  • 152 Otitis media and uri with mcc
  • 153 Otitis media and uri without mcc

Convert H66.90 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change
  • 2023 (effective 10/1/2022): No change
  • 2024 (effective 10/1/2023): No change
  • 2025 (effective 10/1/2024): No change
  • 2026 (effective 10/1/2025): No change

Diagnosis Index entries containing back-references to H66.90:

  • Otitis (acute) H66.90
    • media (hemorrhagic) (staphylococcal) (streptococcal) H66.9-ICD-10-CM Diagnosis Code H66.9-

      Otitis media, unspecified

        2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 Non-Billable/Non-Specific Code
      Applicable To
      • Otitis media NOS
      • Acute otitis media NOS
      • Chronic otitis media NOS
      Use Additional
      • code for any associated perforated tympanic membrane (H72.-)
      • acute, subacute H66.90
      • chronic H66.90

ICD-10-CM Codes Adjacent To H66.90 H66.3X1 …… right ear H66.3X2 …… left ear H66.3X3 …… bilateral H66.3X9 …… unspecified ear H66.4 Suppurative otitis media, unspecified H66.40 …… unspecified ear H66.41 …… right ear H66.42 …… left ear H66.43 …… bilateral H66.9 Otitis media, unspecified H66.90 …… unspecified ear H66.91 …… right ear H66.92 …… left ear H66.93 …… bilateral H67 Otitis media in diseases classified elsewhere H67.1 Otitis media in diseases classified elsewhere, right ear H67.2 Otitis media in diseases classified elsewhere, left ear H67.3 Otitis media in diseases classified elsewhere, bilateral H67.9 Otitis media in diseases classified elsewhere, unspecified ear H68 Eustachian salpingitis and obstruction H68.0 Eustachian salpingitis

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.

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