Geisinger Medical Laboratories Test Catalog

Order Display Name: Geisinger Epic Procedure Code Or ID CPT Code:  


Geisinger Epic Procedure Code: LAB3181             Geisinger Epic ID: 19103

Specimen type:
Preferred collection container:
Alternate Collection Container:
6 mL red-top (plain, non-serum separator) tube
Specimen required:
0.5 mL serum; minimum 0.2 mL

Specimen processing instructions:
Allow to clot. Centrifuge and submit 0.5 mL serum. 
Transport temperature:
Refrigerated (preferred). Room temperature (stable 8 hours) and frozen specimens also acceptable.
Specimen stability:
Room temperature: 8 hours. 2-8°C: 4 days. Frozen: 6 months.
Rejection criteria:
Specimen stability exceeded; specimen grossly hemolyzed.

Interpretation guide:
Negative Absence of detectable Toxoplasma gondii IgG antibodies. A negative result does not rule out acute infection. The test usually scores negative in infected patients during the incubation period and early stages of infection. If exposure to Toxoplasma gondii is suspected despite a negative finding, a second sample should be collected and tested no less than one or two weeks later.
Equivocal Suggest a second sample be collected and tested one to two weeks later.
Positive Presence of detectable Toxoplasma gondii IgG antibodies. A positive result generally indicates either recent or past exposure to the pathogen. If IgG test scores positive in the presence of IgM antibodies, recent infection may be postulated. If IgG test scores positive in the absence of IgM antibodies, past infection may be postulated.

NOTE: This test is for the qualitative determination of IgG antibodies to Toxoplasma gondii.
CPT code(s):
Note: The billing party has sole responsibility for CPT coding.  Any questions regarding coding should be directed to the payer being billed.  The CPT codes provided by GML are based on AMA guidelines and are for informational purposes only.
Test includes:
Antibody detection to Toxoplasma IgG.
Toxoplasma gondii IgG Ab, Toxoplasma IgG antibody
Toxoplasma Antibody IgG
Clinical significance:
This test is useful for determining if a patient has had recent or past exposure to Toxoplasma gondii. IgG antibodies to toxoplasma gondii is indicative of previous exposure (recent or past). A single positive result should not be used to diagnose recent infection.
Doctoral Director(s:)
Hoi-Ying Elsie Yu PhD, DABCC, FADLM    
Review Date: 12/13/2022

Performing Locations

Geisinger Medical Center

Performing laboratory: Immunology
Technical Lead: Kathy Hurst
Frequency: Three days per week, 1st shift.
Performed STAT? No
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