1. ICD-10-CM Codes
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2. A00-B99
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3. B65-B83
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4. B66-
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5. 2023 ICD-10-CM Diagnosis Code B66.1

2023 ICD-10-CM Diagnosis Code B66.1

Clonorchiasis

2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

• B66.1 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
• The 2023 edition of ICD-10-CM B66.1 became effective on October 1, 2022.
• This is the American ICD-10-CM version of B66.1 - other international versions of ICD-10 B66.1 may differ.

• Infection of the biliary passages with clonorchis sinensis, also called opisthorchis sinensis. It may lead to inflammation of the biliary tract, proliferation of biliary epithelium, progressive portal fibrosis, and sometimes bile duct carcinoma. Extension to the liver may lead to fatty changes and cirrhosis. (from Dorland, 27th ed)

• 441 Disorders of liver except malignancy, cirrhosis or alcoholic hepatitis with mcc
• 442 Disorders of liver except malignancy, cirrhosis or alcoholic hepatitis with cc
• 443 Disorders of liver except malignancy, cirrhosis or alcoholic hepatitis without cc/mcc

Convert B66.1 to ICD-9-CM

• 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

• Cholangiohepatitis K83.8
  ICD-10-CM Diagnosis Code K83.8

  Other specified diseases of biliary tract

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Applicable To

  • Adhesions of biliary tract
  • Atrophy of biliary tract
  • Hypertrophy of biliary tract
  • Ulcer of biliary tract
  • due to fluke infestation B66.1
• Cirrhosis, cirrhotic (hepatic) (liver) K74.60
  ICD-10-CM Diagnosis Code K74.60

  Unspecified cirrhosis of liver

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Applicable To

  • Cirrhosis (of liver) NOS
  • biliary (cholangiolitic) (cholangitic) (hypertrophic) (obstructive) (pericholangiolitic) K74.5
    ICD-10-CM Diagnosis Code K74.5

    Biliary cirrhosis, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • due to
      • Clonorchiasis B66.1
• Clonorchiasis, clonorchis infection B66.1 (liver)
• Disease, diseased - see also Syndrome
  • liver (chronic) (organic) K76.9
    ICD-10-CM Diagnosis Code K76.9

    Liver disease, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • fluke
      • Chinese B66.1
      • oriental B66.1
  • Chinese liver fluke B66.1
  • Oriental liver fluke B66.1
• Distomiasis B66.9
  ICD-10-CM Diagnosis Code B66.9

  Fluke infection, unspecified

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • hepatic B66.3
    ICD-10-CM Diagnosis Code B66.3

    Fascioliasis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Infection due to Fasciola gigantica
    • Infection due to Fasciola hepatica
    • Infection due to Fasciola indica
    • Sheep liver fluke disease
    • due to Clonorchis sinensis B66.1
  • liver B66.3
    ICD-10-CM Diagnosis Code B66.3

    Fascioliasis

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

    Applicable To

    • Infection due to Fasciola gigantica
    • Infection due to Fasciola hepatica
    • Infection due to Fasciola indica
    • Sheep liver fluke disease
    • due to Clonorchis sinensis B66.1
• Infection, infected, infective (opportunistic) B99.9
  ICD-10-CM Diagnosis Code B99.9

  Unspecified infectious disease

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
  • Clonorchis B66.1 (sinensis) (liver)
• Infestation B88.9
  ICD-10-CM Diagnosis Code B88.9

  Infestation, unspecified

  2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

  Applicable To

  • Infestation (skin) NOS
  • Infestation by mites NOS
  • Skin parasites NOS
  • fluke B66.9
    ICD-10-CM Diagnosis Code B66.9

    Fluke infection, unspecified

    2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
    • liver (sheep) B66.3
      ICD-10-CM Diagnosis Code B66.3

      Fascioliasis

      2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code

      Applicable To

      • Infection due to Fasciola gigantica
      • Infection due to Fasciola hepatica
      • Infection due to Fasciola indica
      • Sheep liver fluke disease
      • Chinese B66.1
      • due to clonorchiasis B66.1
      • oriental B66.1
  • Clonorchis B66.1 (sinensis) (liver)

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