Geisinger Medical Laboratories Test Catalog

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


Geisinger Epic Procedure Code: LAB3182             Geisinger Epic ID: 7474

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: 48 hours. Frozen: 6 months.
Rejection criteria:
Specimen stability exceeded; specimen grossly hemolyzed.

Interpretation guide:
Result Interpretation
Negative Absence of detectable Toxoplasma gondii IgM antibodies. A negative result does not rule out acute toxoplasmosis because the infection may be in its very early stage and the patient has not developed Toxoplasmosis gondii specific IgM. If exposure to Toxoplasma gondii is suspected despite a negative finding, a second sample should be collected and tested three weeks later.
Equivocal Suggest a second sample be collected and tested one to two weeks later.
Positive Possible presence of detectable Toxoplasma gondii IgM antibodies. A specimen with a positive result should be further tested for Toxoplasma gondii IgG.
NOTE: This test is for the qualitative determination of IgM 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 IgM.
Toxoplasma gondii IgM Antibody, TOXOM, T. gondii, TORCH
Toxoplasma Antibody IgM, Toxoplasma IgM antibody
Clinical significance:
Toxoplasmosis is an infectious disease caused by the parasite Toxoplasma gondii. Toxoplasmosis IgM antibodies develop 2-4 weeks after onset of infection and generally disappear in 3-9 months. Toxoplasma IgG antibodies rise gradually and peak 2-5 months post onset of infection. The presence of an IgM antibody with an absent or low-positive IgG is generally indicative of acute toxoplasmosis.
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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