2022 ICD-10-CM Diagnosis Code A79.81

Rickettsiosis due to Ehrlichia sennetsu

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
  • A79.81 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2022 edition of ICD-10-CM A79.81 became effective on October 1, 2021.
  • This is the American ICD-10-CM version of A79.81 - other international versions of ICD-10 A79.81 may differ.
Applicable To
  • Rickettsiosis due to Neorickettsia sennetsu
The following code(s) above A79.81 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 A79.81:
  • A00-B99
    2022 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
Approximate Synonyms
  • Rickettsiosis due to erhlichia sennetsu
  • Sennetsu fever
ICD-10-CM A79.81 is grouped within Diagnostic Related Group(s) (MS-DRG v39.0):
  • 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 A79.81 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
Code annotations containing back-references to A79.81:
  • Type 1 Excludes: A75
    , A77.4
    ICD-10-CM Diagnosis Code A75

    Typhus fever

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • rickettsiosis due to Ehrlichia sennetsu (A79.81)
    ICD-10-CM Diagnosis Code A77.4

    Ehrlichiosis

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    Type 1 Excludes
    • anaplasmosis [A. phagocytophilum] (A79.82)
    • rickettsiosis due to Ehrlichia sennetsu (A79.81)

Diagnosis Index entries containing back-references to A79.81:
  • Ehrlichiosis A77.40
    ICD-10-CM Diagnosis Code A77.40

    Ehrlichiosis, unspecified

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
  • Rickettsiosis A79.9
    ICD-10-CM Diagnosis Code A79.9

    Rickettsiosis, unspecified

      2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
    Applicable To
    • Rickettsial infection NOS
    • due to
      • Ehrlichia sennetsu A79.81
      • Neorickettsia sennetsu A79.81

ICD-10-CM Codes Adjacent To A79.81
A77.40 …… unspecified
A77.41 …… chafeensis [E. chafeensis]
A77.49 Other ehrlichiosis
A77.8 Other spotted fevers
A77.9 Spotted fever, unspecified
A78 Q fever
A79 Other rickettsioses
A79.0 Trench fever
A79.1 Rickettsialpox due to Rickettsia akari
A79.8 Other specified rickettsioses
A79.81 Rickettsiosis due to Ehrlichia sennetsu
A79.82 Anaplasmosis [A. phagocytophilum]
A79.89 Other specified rickettsioses
A79.9 Rickettsiosis, unspecified
A80 Acute poliomyelitis
A80.0 Acute paralytic poliomyelitis, vaccine-associated
A80.1 Acute paralytic poliomyelitis, wild virus, imported
A80.2 Acute paralytic poliomyelitis, wild virus, indigenous
A80.3 Acute paralytic poliomyelitis, other and unspecified
A80.30 Acute paralytic poliomyelitis, unspecified
A80.39 Other acute paralytic poliomyelitis

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