Ordering Recommendation

Confirm infectious agent as C. burnetii (Q-fever) in symptomatic patients.




Semi-Quantitative Indirect Fluorescent Antibody


Mon, Wed, Fri


1-6 days

New York DOH Approval Status

This test is New York DOH approved.

Specimen Required

Patient Preparation

Serum separator tube (SST).

Specimen Preparation

Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.3 mL) Parallel testing is preferred and convalescent specimens must be received within 30 days from receipt of the acute specimens. Mark specimens plainly as "acute" and "convalescent."

Storage/Transport Temperature


Unacceptable Conditions

Contaminated, hemolyzed, or severely lipemic specimens.


After separation from cells: Ambient: 48 hours; Refrigerated: 2 weeks; Frozen: 1 year (avoid repeated freeze/thaw cycles)

Reference Interval

Test Number Components Reference Interval
C. burnetii (Q-Fever) Ab, Phase I IgG Negative
C. burnetii (Q-Fever) Ab, Phase II IgG Negative
C. burnetii (Q-Fever) Ab, Phase I IgM Negative
C. burnetii (Q-Fever) Ab, Phase II IgM Negative

Interpretive Data

Refer to report.

Compliance Category



For IgG or IgM testing, if any Phase I or Phase II screening result is Indeterminate or Positive, then titer(s) will be added.  Additional charges apply.

Hotline History


CPT Codes

86638 x4; if reflexed add 86638 per titer


Component Test Code* Component Chart Name LOINC
2012626 C. Burnetii Abs, IgG Phase I Screen 48720-7
2012628 C. Burnetii Abs, IgG Phase II Screen 48719-9
2012639 C. burnetii (Q-Fever) Ab, Phase I IgM 63455-0
2012641 C. burnetii (Q-Fever) Ab, Phase II IgM 43928-1
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.


  • Coxiella burnetii
  • Coxiella Titer
  • Q Fever Phase I IFA
  • Q Fever Phase II IFA
Coxiella burnetii (Q-Fever) Antibodies, IgG and IgM, Phase I and II with Reflex to Titer