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Babesia microti Antibodies (IgG, IgM), IFA

Test Code


CPT Code(s)

86753 (x2)

Preferred Specimen(s)

1 mL serum

Minimum Volume

0.1 mL

Specimen Container

Plastic screw-cap vial

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 72 hours
Refrigerated: 7 days
Frozen: 30 days


Immunofluorescence Assay (IFA)

This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the U.S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Performing Laboratory

Quest Diagnostics Nichols Institute
14225 Newbrook Drive
Chantilly, VA 20153

Setup Schedule

Set up: Tues-Sat a.m.; Report available: Next day


Individuals infected with malaria may falsely test positive.

Reference Range(s)

Babesia microti Antibodies IgG <1:64
Babesia microti Antibodies IgM <1:20

Clinical Significance

Babesia serological testing is used to diagnose infection by the Babesia tick-borne protozoan. Infection may cause hemolytic anemia.

Alternative Name(s)

Human Babesiosis, Babesiosis IgG & IgM

LOINC®' Code(s)

The Result and LOINC information listed below should not be used for electronic interface maintenance with Quest Diagnostics. Please contact the Quest Diagnostics Connectivity Help Desk for more information at 800-697-9302.

NOTE: The codes listed in the table below are not orderable Test Codes.

Result NameLOINC CodeComponent Name
2110ABabesia microti Ab (IgG)16117-4Babesia microti Ab.IgG
2110BBabesia microti Ab (IgM)16118-2Babesia microti Ab.IgM
2110CInterpretationPending assignment

Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.

The CPT codes provided 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 payer being billed.

LOINC assignment is based on a combination of test attributes, including the method used by the performing laboratory. For tests not performed by Quest Diagnostics, codes are assigned by the performing laboratory.

* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.