ICD-10-CM A77: Spotted fever [tick-borne rickettsioses]

ICD-10-CM Diagnosis Code (2025)

Official Description for A77

Spotted fever [tick-borne rickettsioses]

Coding Notes & Guidelines for A77

Excludes1: Not Coded Here
  • anaplasmosis [A. phagocytophilum] (A79.82)
  • rickettsiosis due to Ehrlichia sennetsu (A79.81)
Inclusion Terms
  • Rocky Mountain spotted fever
  • Sao Paulo fever
Inclusion Terms
  • African tick typhus
  • Boutonneuse fever
  • India tick typhus
  • Kenya tick typhus
  • Marseilles fever
  • Mediterranean tick fever
Inclusion Terms
  • North Asian tick fever
  • Siberian tick typhus
Inclusion Terms

Queensland tick typhus

Inclusion Terms
  • Ehrlichiosis due to E. ewingii
  • Ehrlichiosis due to E. muris euclairensis
Inclusion Terms
  • Rickettsia 364D/R. philipii (Pacific Coast tick fever)
  • Spotted fever due to Rickettsia africae (African tick bite fever)
  • Spotted fever due to Rickettsia parkeri
Inclusion Terms

Tick-borne typhus NOS

Child Codes (More Specific Codes for A77):

A77.0 - Spotted fever due to Rickettsia rickettsii A77.1 - Spotted fever due to Rickettsia conorii A77.2 - Spotted fever due to Rickettsia siberica A77.3 - Spotted fever due to Rickettsia australis A77.4 - Ehrlichiosis A77.40 - Ehrlichiosis, unspecified A77.41 - Ehrlichiosis chaffeensis [E. chaffeensis] A77.49 - Other ehrlichiosis A77.8 - Other spotted fevers A77.9 - Spotted fever, unspecified

About ICD-10-CM Code A77 (Spotted fever [tick-borne rickettsioses])

ICD-10-CM code A77 is a billable or specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes. The 2025 edition of ICD-10-CM A77 became effective on October 1, 2024.

This page provides detailed information about A77 - Spotted fever [tick-borne rickettsioses]. It includes common terminology, coding guidelines such as "Includes," "Excludes1," and "Excludes2" notes, and information on required 7th characters. Utilizing this information correctly is essential for accurate medical coding and claims submission for conditions like Spotted fever [tick-borne rickettsioses].