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NMDA Receptor (NR1-subunit) Autoantibody Test
Test Code92394
CPT Codes
86255
Preferred Specimen
2 mL serum collected in SST® (serum separator tube)
Minimum Volume
0.5 mL
Other Acceptable Specimens
CSF collected in: Sterile leak-proof container
Instructions
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.
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
Serum
Room temperature: 72 hours
Refrigerated: 28 days
Frozen: 1 year
CSF
Room temperature: 72 days
Refrigerated: 28 days
Frozen: 28 Days
Room temperature: 72 hours
Refrigerated: 28 days
Frozen: 1 year
CSF
Room temperature: 72 days
Refrigerated: 28 days
Frozen: 28 Days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Turbid • Bacterial contamination
Methodology
Immunofluorescence Assay (IFA)
Setup Schedule
Set up: Sun-Thurs; Report available: 5-7 days
Clinical Significance
Anti-NMDA receptor (NR1-subunit) antibody is found in patients with encephalitis, acute psychiatric disturbances, seizures, memory deficits, and hypoventilation.
