2020 ICD-10-CM Diagnosis Code B66.1

Clonorchiasis

    2016 2017 2018 2019 2020 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 2020 edition of ICD-10-CM B66.1 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of B66.1 - other international versions of ICD-10 B66.1 may differ.
Applicable To
  • Chinese liver fluke disease
  • Infection due to Clonorchis sinensis
  • Oriental liver fluke disease
The following code(s) above B66.1 contain annotation back-references
Annotation Back-References
In 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 B66.1:
  • A00-B99
    2020 ICD-10-CM Range A00-B99

    Certain infectious and parasitic diseases

    Includes
    • diseases generally recognized as communicable or transmissible
    Type 1 Excludes
    • certain localized infections - see body system-related chapters
    Type 2 Excludes
    • carrier or suspected carrier of infectious disease (Z22.-)
    • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
    • infectious and parasitic diseases specific to the perinatal period (P35-P39)
    • influenza and other acute respiratory infections (J00-J22)
    Use Additional
    • code to identify resistance to antimicrobial drugs (Z16.-)
    Certain infectious and parasitic diseases
Clinical Information
  • 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)
ICD-10-CM B66.1 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 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

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

Diagnosis Index entries containing back-references to B66.1:
  • Cholangiohepatitis K83.8
    ICD-10-CM Diagnosis Code K83.8

    Other specified diseases of biliary tract

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

      Fascioliasis

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

        Fascioliasis

          2016 2017 2018 2019 2020 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)

ICD-10-CM Codes Adjacent To B66.1
B64 Unspecified protozoal disease
B65 Schistosomiasis [bilharziasis]
B65.0 Schistosomiasis due to Schistosoma haematobium [urinary schistosomiasis]
B65.1 Schistosomiasis due to Schistosoma mansoni [intestinal schistosomiasis]
B65.2 Schistosomiasis due to Schistosoma japonicum
B65.3 Cercarial dermatitis
B65.8 Other schistosomiasis
B65.9 Schistosomiasis, unspecified
B66 Other fluke infections
B66.0 Opisthorchiasis
B66.1 Clonorchiasis
B66.2 Dicroceliasis
B66.3 Fascioliasis
B66.4 Paragonimiasis
B66.5 Fasciolopsiasis
B66.8 Other specified fluke infections
B66.9 Fluke infection, unspecified
B67 Echinococcosis
B67.0 Echinococcus granulosus infection of liver
B67.1 Echinococcus granulosus infection of lung
B67.2 Echinococcus granulosus infection of bone

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