2020 ICD-10-CM Diagnosis Code B64

Unspecified protozoal disease

    2016 2017 2018 2019 2020 Billable/Specific Code
  • B64 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 B64 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of B64 - other international versions of ICD-10 B64 may differ.
The following code(s) above B64 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 B64:
  • 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
  • B50-B64
    2020 ICD-10-CM Range B50-B64

    Protozoal diseases

    Type 1 Excludes
    • amebiasis (A06.-)
    • other protozoal intestinal diseases (A07.-)
    Protozoal diseases
Approximate Synonyms
  • Protozoan infection
Clinical Information
  • Infections with unicellular organisms formerly members of the subkingdom protozoa.
  • Infections with unicellular organisms of the subkingdom protozoa.
ICD-10-CM B64 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 867 Other infectious and parasitic diseases diagnoses with mcc
  • 868 Other infectious and parasitic diseases diagnoses with cc
  • 869 Other infectious and parasitic diseases diagnoses without cc/mcc

Convert B64 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 B64:

ICD-10-CM Codes Adjacent To B64
B60 Other protozoal diseases, not elsewhere classified
B60.0 Babesiosis
B60.1 Acanthamebiasis
B60.10 …… unspecified
B60.11 Meningoencephalitis due to Acanthamoeba (culbertsoni)
B60.12 Conjunctivitis due to Acanthamoeba
B60.13 Keratoconjunctivitis due to Acanthamoeba
B60.19 Other acanthamebic disease
B60.2 Naegleriasis
B60.8 Other specified protozoal diseases
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

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