Glutamic Acid Decarboxylase (GAD65) Antibody Assay, Spinal Fluid

Test Code

39010

CPT Codes
86341

Includes

If IFA pattern suggests GAD65 antibody, then GAD65 antibody radioimmunoassay is performed at an additional charge.

Preferred Specimen

2 mL CSF collected in a sterile leak-proof container

Minimum Volume

1 mL

Transport Temperature

Refrigerated (cold packs)

Specimen Stability

Room temperature: 72 hours
Refrigerated: 28 days
Frozen: 28 days

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Gross hemolysis • Gross lipemia • Gross icterus

Methodology
Radioimmunoassay (RIA)

FDA Status
This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

Setup Schedule

Monday-Sunday Morning Report available: 3 Days

Reference Range

≤ 0.02 nmol/L

(Reference values apply to all ages)

Clinical Significance

Possible use in evaluating patients with stiff-man syndrome, autoimmune cerebellitis and other acquired central nervous system disorders affecting gabaminergic neurotransmission.

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.