Geisinger Medical Laboratories Test Catalog

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


Geisinger Epic Procedure Code: LAB1329             Geisinger Epic ID: 53241

Specimen type:
Preferred collection container:
Alternate Collection Container:
6 mL red-top (plain, non-serum separator) tube
Specimen required:
2 ml frozen serum; minimum 0.3 mL

Specimen processing instructions:
Allow the blood to clot in an upright position for at least 30 minutes but not longer than 1 hour before centrifugation. Centrifuge for at least 15 minutes at 2200-2500 RPM at ambient temperature within one hour of collection. Store at -20°C and send 2 mL of serum frozen in a plastic vial. 
Transport temperature:
Specimen stability:
Room temperature: 48 hours. Refrigerated: 14 days. Frozen: 30 days/
Rejection criteria:
Gross hemolysis • Lipemia • Microbially contaminated specimens • Specimens received outside of stability

Additional information:
This test was developed and its performance characteristics determined by BioAgilytix Diagnostics. It has not been cleared or approved by the FDA. BioAgilytix Diagnostics is regulated under CLIA as qualified to perform high complexity testing. This test is used for clinical purposes.
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:
Endomysial IgG Titer will report when the titer is =2.5 (CPT code(s): 86256)
Immunofluorescence Assay
Quest test code 91985, Endo IgG
Clinical significance:
Serological methods of detecting Immunoglobulin A (IgA) antibodies to gliadin, endomysium (EMA), reticulin, and tissue transglutaminase are routinely used for diagnosing both symptomatic and asymptomatic patients with Celiac Disease (CD). Since Immunoglobulin A (IgA) deficiency is 10 to 15 times more common in patients with Celiac Disease than in healthy subjects, IgG-specific antibody tests for endomysium are useful for the identification of IgA-deficient patients with CD.

Performing Locations

Quest Diagnostics

Technical Lead: Michael Weaver    
Frequency: Set up: Mon-Fri; Report available: 2 days    
Performed STAT? No
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