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Labcorp Oklahoma, Inc.
Test Directory


Index:

Glutamic Acid Decarboxylase-65 Autoantibodies

Order Name ANTI GAD
Test Number: 5592950
Revision Date 02/27/2023
Test Name Methodology LOINC Code
Glutamic Acid Decarboxylase-65 Autoantibodies
Enzyme-Linked Immunosorbent Assay (ELISA) 56540-8 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 1 mL (0.4 mL) Serum Clot Activator SST Room Temperature
Alternate 1 1 mL (0.4 mL) Serum Clot Activator (Red Top, No-Gel) Room Temperature
Instructions Notes: 0.4 mL (Note: This volume Does NOT allow for repeat testing.)
Specimen Type: Red-top tube or gel-barrier tube
Specimen Storage: Room temperature
Specimen Collection: If a red-top tube is used, transfer separated serum to a plastic transport tube. Avoid hemolysis.
Special Instructions: This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R). It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample
Specimen Stability: Ambient: 14 days, Refrigerated : 14 days, Frozen: 14 days
GENERAL INFORMATION
Expected TAT 3 - 4 days  
Performing Labcorp Test Code 143008 
Notes Labcorp Test Code: 143008
CPT Code(s) 86341
Lab Section Reference Lab