Test Overview
Test Methodology
Radioimmunoassay (RIA)
Test Usage
Assessing susceptibility to autoimmune (type 1) diabetes mellitus and related endocrine disorders. Distinguishing between type 1 and type 2 diabetes. Confirming diagnosis of stiff-man syndrome and related autoimmune encephalomyelopathies.
Reference Range *
< or = 0.02 nmol/L
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Test Details
Days Set Up
Monday - Sunday
Analytic Time
3 - 7 days
Soft Order Code
GAD65
MiChart Code
Glutamic Acid Decarboxylase Antibody
Synonyms
- Anti-GAD
- GAD (Glutamic Acid Decarboxylase) Antibody
- GAD 65
- Glutamate Decarboylase AB
- ICAB
- Islet Cell Cytoplasmic Antibody
- Stiffman Syndrome
Laboratory
Sendout
Reference Laboratory
Mayo GD65S (81596)
Section
Special Testing
Specimen Requirements
Collection Instructions
Collect specimen in red top or SST tube. Centrifuge, aliquot ALL serum into a plastic vial and refrigerate.
Normal Volume
2.0 mL serum
Minimum Volume
1 mL serum
Additional Information
Test sent to Mayo Medical Laboratories.
Billing
CPT Code
86341
Fee Code
32140
NY State Approved
No