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GAD65 Antibody Test #422
Type of Disorder: Paraneoplastic Disorders
Typical Presentation: Stiff-person syndrome, paroxymal autonomic dysfunction
Disease(s) tested for: Paraneoplastic neurological disorders (PNDs)
Test Details
Test Code: 422
Profiles that contain this test: NeoCerebellar Degeneration Paraneoplastic Profile with Recombx, NeoComplete Paraneoplastic Profile with Recombx, NeoEncephalitis Paraneoplastic Profile with Recombx
Informed Consent Required: No
Technical Information
Utility: Detection of GAD antibodies for PNS
Methodology: ELISA
Reference Value: Initial run at neat: negative = 0; If result is positive, sample is diluted and reference ranges are as follows: Negative: 1-600 Borderline: 600-1200 Positive:>1200
CPT Coding
The CPT codes provided 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 payer being billed.
Stacked CPT Code(s): 83516(1)
CPT 2013: 83516(1)
Shipping Considerations
Please label each specimen tube with two forms of patient identification. These forms of identification must also appear on the requisition form.
Preferred Specimen Requirements
Type: Serum
Minimum Volume: 2 mL
Collection Tube: Red top
Storage Conditions: Refrigerate if not shipped same day. Serum stable up to three days. Ship whole blood immediately.
Shipping Conditions: Room temperature, avoid freezing. Ship same day.
Test Turnaround: 7-14 days
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