A78
ICD-10BillableQ fever
Official ICD-10-CM descriptor (FY2026)
Q fever
A78 is valid for submission on a claim: CMS flags it as a billable, specific code.
Inclusion terms
- Infection due to Coxiella burnetii
- Nine Mile fever
- Quadrilateral fever
Where this code sits
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ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.