A77.0
Spotted fever due to Rickettsia rickettsii
Billable code
This code does not map to a risk-adjusting HCC in the loaded models.
Coding notes
Excludes 1 never coded together · Excludes 2 may co-exist
This code · A77.0
Synonyms
Rocky Mountain spotted fever Sao Paulo fever
Inherited from chapter 1Certain infectious and parasitic diseases
Includes
diseases generally recognized as communicable or transmissible
Excludes 1
certain localized infections - see body system-related chapters
Excludes 2
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.-)
Official Guidelines for A77.0
FY 2026 ›I.C.1Chapter-specific guidanceChapter 1: Certain Infectious and Parasitic Diseases (A00-B99), U07.1, U09.9
Subsections
- I.C.1.aHuman Immunodeficiency Virus (HIV) Infections
- I.C.1.bInfectious agents as the cause of diseases classified to other chapters
- I.C.1.cInfections resistant to antibiotics
- I.C.1.dSepsis, Severe Sepsis, and Septic Shock Infections resistant to antibiotics
- I.C.1.eMethicillin Resistant Staphylococcus aureus (MRSA) Conditions
- I.C.1.fZika virus infections
- I.C.1.gCoronavirus infections
Find A77.0 in the alphabetic index
15 index paths lead to this code
- Lone Star fever
- Rocky Mountain fever
- Sao Paulo fever or typhus
- Fever › Bullis
- Fever › Lone Star
- Fever › Rocky Mountain spotted
- Fever › Sao Paulo
- Typhus › Sao Paulo
- Fever › American › spotted
- Fever › mountain › meaning Rocky Mountain spotted fever
- Fever › spotted › American
- Fever › spotted › Brazilian
- Fever › spotted › Colombian
- Fever › spotted › Rocky Mountain
- Fever › spotted › due to Rickettsia › rickettsii