Diagnosis Code


Code Information

Diagnosis Code: A79.9

Short Description: Rickettsiosis, unspecified

Long Description: Rickettsiosis, unspecified

The code A79.9 is VALID for claim submission

Code Classification:

  • Certain infectious and parasitic diseases (A00–B99)
    • Rickettsioses (A75-A79)
      • Other rickettsioses (A79)
        • A79.9 Rickettsiosis, unspecified

Code Version: 2020 ICD-10-CM


  • Disease caused by rickettsiae
  • Disease due to Rickettsia
  • Disease due to Rickettsiales
  • Encephalitis due to rickettsia
  • Myocarditis due to Genus Rickettsia
  • Rickettsial endocarditis
  • Rickettsial pneumonia

Diagnostic Related Group(s)

The code A79.9 is grouped in the following Diagnostic Related Group(s) (MS-DRG v37.0)
  • Other Infectious And Parasitic Diseases Diagnoses With Mcc (867)
  • Other Infectious And Parasitic Diseases Diagnoses With Cc (868)
  • Other Infectious And Parasitic Diseases Diagnoses Without Cc/mcc (869)

References to Index of Diseases and Injuries

The code A79.9 has the following ICD-10-CM references to the Index of Diseases and Injuries
  • Inclusion Terms:
    • Rickettsial infection NOS

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
A79.9 Right Arrow 083.9 Rickettsiosis NOS

This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
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
A79.89 Other specified rickettsioses

This page was last updated on: 10/1/2020