A75-A79
Rickettsioses
Codes in this block
26 codes
Billableusable codeNon-billableheader / grouping codeRisk-adjusting
- A75Typhus feverNon-billable
- A75.0Epidemic louse-borne typhus fever due to Rickettsia prowazekiiBillable
- A75.1Recrudescent typhus [Brill's disease]Billable
- A75.2Typhus fever due to Rickettsia typhiBillable
- A75.3Typhus fever due to Rickettsia tsutsugamushiBillable
- A75.9Typhus fever, unspecifiedBillable
- A77Spotted fever [tick-borne rickettsioses]Non-billable
- A77.0Spotted fever due to Rickettsia rickettsiiBillable
- A77.1Spotted fever due to Rickettsia conoriiBillable
- A77.2Spotted fever due to Rickettsia sibericaBillable
- A77.3Spotted fever due to Rickettsia australisBillable
- A77.4EhrlichiosisNon-billable
- A77.40Ehrlichiosis, unspecifiedBillable
- A77.41Ehrlichiosis chaffeensis [E. chaffeensis]Billable
- A77.49Other ehrlichiosisBillable
- A77.8Other spotted feversBillable
- A77.9Spotted fever, unspecifiedBillable
- A78Q feverBillable
- A79Other rickettsiosesNon-billable
- A79.0Trench feverBillable
- A79.1Rickettsialpox due to Rickettsia akariBillable
- A79.8Other specified rickettsiosesNon-billable
- A79.81Rickettsiosis due to Ehrlichia sennetsuBillable
- A79.82Anaplasmosis [A. phagocytophilum]Billable
- A79.89Other specified rickettsiosesBillable
- A79.9Rickettsiosis, unspecifiedBillable
Official Guidelines for A75-A79
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