Laboratory Services

Glutamic Acid Decarboxylase (GAD65) Antibody Assay, Serum

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Updated Test Information:

Test Description
Glutamic Acid Decarboxylase (GAD65) Antibody Assay, Serum
Synonym(s)

64K Antibody, Anti-GAD Antibodies, Anti-Glutamic Acid Decarboxylase Ab, Beta Cell Antibody, GAD65 Antibody Assay, Glutamate Decarboxylase Antibodies (GAD65), Islet cell antibody, Pancreatic Islet Cell Ab, Stiffman Syndrome, Stiff person, Ataxia

Test ID
GD65S
General Information

Assessing susceptibility to autoimmune (type 1, insulin-dependent) diabetes mellitus and related endocrine disorders (eg, thyroiditis and pernicious anemia)


Distinguishing between patients with type 1 and type 2 diabetes


Confirming a diagnosis of stiff-man syndrome, autoimmune encephalitis, autoimmune ataxia, brain stem encephalitis, autoimmune epilepsy, autoimmune myelopathy

Container Type

Red Top

Specimen Type

Serum

Specimen Requirements

1.5 mL

Alternate Specimen Type

SST

Specimen Collection / Processing Instructions

Centrifuge and aliquot into a plastic vial

Minimum Sample Volume

1 mL

Stability

Refrigerated (preferred) 28 days
Frozen 28 days
Ambient 72 hours

Unacceptable Specimen Conditions

Gross hemolysis, Gross Lipemia, Gross icterus

Methodology

Radioimmunoassay (RIA)

Estimated TAT

3 to 6 days

Testing Schedule

Monday through Sunday

Retention

28 days

CPT Code(s)

86341

Reference Range

< or =0.02 nmol/L


Reference values apply to all ages.

STAT Orderable (Y/N)

no

Performing Lab

Mayo

LOINC Code(s)

30347-9