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HelpTest Code GAD Antibodies against Glutamic Acid Decarboxylase (GAD)
Additional Codes
| Epic Ordering Code | LAB3003 |
| NBS code | LBC00082 |
| Service code | 31207 |
Specimen Requirements
Submit the following:
| Container: |
| Red Top |
Processing Requirements
Allow specimen to clot for 30 mins and centrifuge within 2 hours
Specimen type: Serum
Volume: 0.5mL
Storage/transport requirements: Refrigerated
Specimen Stability
| Specimen Type | Serum |
|---|---|
| Ambient | 1 day |
| Refrigerate | 2 weeks (preferred) |
| Frozen | 3 months |
Specimen Condition
| Gross Haemolysis | Reject |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Methodology
Enzyme Immunoassay
Days and Times Performed
Alternate Fridays, TAT 2 - 15 days
Reference Interval
No antibody detected: < 10 IU/mL
Antibody detected: ≥ 10 IU/mL
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Autoantibodies to pancreatic beta cell antigens are important serological markers of type 1 diabetes mellitus.
Update
Last updated 24/06/2025
LOINC Code Information
13926-1
Alias
Anti-GAD Antibodies
Anti-Glutamic Acid Decarboxylase Ab
Anti-Glutamic Acid Decarboxylase (GAD)
Glutamate Decarboxylase Antibodies (GAD65)
Test Classification
This laboratory test has undergone in-house evaluation with appropriate quality assurance and control measures in line with laboratory best practice and accreditation requirements.
Reagent(s) used in this test is/are ordered through HSA's Special Access Route, which provides interim access without full registration.