A78 — Q fever
A78 is a billable, specific ICD-10-CM code for q fever. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Infection due to Coxiella burnetii
- Nine Mile fever
- Quadrilateral fever
Risk adjustment
A78 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.
Medicare coverage
A78 is named in 6 Medicare coverage policies — 6 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A56500Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A56500Billing and Coding: Cardiac Catheterization and Coronary Angiography
How A78 is indexed
Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to A78.
- Balkan grippe
- Q fever
- Quadrilateral fever
- Australian›Q fever
- Endocarditis›Coxiella burnetii
- Endocarditis›Q fever
- Fever›Australian Q
- Fever›Nine-Mile
- Fever›Q
- Fever›quadrilateral
- Grippe, grippal›Balkan
- Infection, infected, infective›Coxiella burnetii
Questions about A78
- Is A78 a billable ICD-10-CM code?
- Yes. A78 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does A78 sit in the tabular list?
- Certain infectious and parasitic diseases (A00-B99), in the block Rickettsioses (A75-A79).