A78
Q fever
Billable FY2026 2025-10-01 → 2026-09-30
Exclusions 5 never code together
A00-B99chapter
Excludes1
- certain localized infections - see body system-related chapters
Excludes2
- carrier or suspected carrier of infectious disease (Z22.-)Z22.-
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)O98.-
- infectious and parasitic diseases specific to the perinatal period (P35-P39)P35-P39
- influenza and other acute respiratory infections (J00-J22)J00-J22
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 5
Index entries leading here 9
- Australian
- Q fever A78
- Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) R50.9
- Grippe, grippal — see also Influenza
- Balkan A78
- Balkan grippe A78
- Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular) I38
- Infection, infected, infective (opportunistic) B99.9
- Pneumonia (acute) (double) (migratory) (purulent) (septic) (unresolved) J18.9
- in (due to)
- Q fever A78
- in (due to)
- Q fever A78
- with pneumonia A78
- Quadrilateral fever A78
Medications 5
27 Fever drugs 11 Rheumatic Fever drugs 7 Typhoid Fever drugs 7 Blackwater Fever drugs 6 Relapsing Fever drugs
MED-RT files conditions by MeSH, which carves the world differently from ICD-10. These are name matches on this code's description, offered as candidates — not as an assertion that they are this code.
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.