Q Fever (Coxiella burnetii) Antibodies (IgG, IgM), with Reflex to Titers

Message

For Specimen Integrity during Extreme Weather see the “Lockbox Usage in Extreme Weather” document at the top of this page.

Test Code

QFEVER

CPT Codes
86638 (x4)

Includes

If Q Fever IgG Phase I is Positive, then Q Fever IgG Phase I Titer will be performed at an additional charge (CPT code(s): 86638).
If Q Fever IgG Phase II is Positive, then Q Fever IgG Phase II Titer will be performed at an additional charge (CPT code(s): 86638).
If Q Fever IgM Phase I is Positive, then Q Fever IgM Phase I Titer will be performed at an additional charge (CPT code(s): 86638).
If Q Fever IgM Phase II is Positive, then Q Fever IgM Phase II Titer will be performed at an additional charge (CPT code(s): 86638).

Preferred Specimen

1 mL serum

Minimum Volume

0.2 mL

Transport Container

Plastic screw-cap vial

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 4 days
Refrigerated: 7 days
Frozen: 30 days

Methodology
Immunofluorescence Assay (IFA)

Setup Schedule

Set up: Tues-Sat; Report available: 2-5 days

Reference Range

	Screen	Titer
Q Fever IgG Phase I	Negative	<1:16
Q Fever IgG Phase II	Negative	<1:16
Q Fever IgM Phase I	Negative	<1:16
Q Fever IgM Phase II	Negative	<1:16

Clinical Significance

Caused by infection with rickettsia agent, Coxiella burnetii, Q Fever is characterized by fever with interstitial pneumonitis. Sixty percent of infected individuals are asymptomatic while other infected individuals may die from complications.

Performing Laboratory

Quest Diagnostics Nichols Institute-San Juan Capistrano, CA

33608 Ortega Highway

San Juan Capistrano, CA 92675-2042

Last Updated: December 6, 2021

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.