GAD65 Neurological Syndrome Antibody Test

Test Code

CPT Codes

Preferred Specimen
2 mL serum

Minimum Volume
0.5 mL

Serum must be separated from whole blood within 48 hours of collection.

Note: Please label each specimen tube with two forms of patient identification. These forms of identification must also appear on the requisition form.

Transport Temperature
Refrigerated (cold packs)

Specimen Stability
Room temperature: 72 hours
Refrigerated: 28 days
Frozen: 4 months

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis • Lipemic • Turbid • Bacterial contamination

Enzyme Linked Immunosorbent Immunoassay (ELISA)

Setup Schedule

Set up: Mon, Wed, Fri; Report available: 7-10 days

Clinical Significance
Anti-GAD65 antibody is found in patients with Stiff-Person syndrome, subacute cerebellar ataxia, or encephalitis.

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.