NMDA Receptor (NR1-subunit) Autoantibody Test

Test Code
92394


CPT Codes
86255

Preferred Specimen
2 mL serum


Minimum Volume
0.5 mL


Other Acceptable Specimens
CSF submitted in a 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.


Transport Container
Plastic screw-cap vial


Transport Temperature
Refrigerated (cold packs)


Specimen Stability
Serum
Room temperature: 72 hours
Refrigerated: 28 days
Frozen: 1 year

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


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


Methodology
Immunofluorescence Assay (IFA)

FDA Status
This test was developed and its analytical performance characteristics have been determined by Athena Diagnostics. It has not been cleared or approved by FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Setup Schedule
Set up: Sun-Thurs a.m.; Report available: 5-7 days


Reference Range
Technical Results Negative


Clinical Significance
Anti-NMDA receptor (NR1-subunit) antibody is found in patients with encephalitis, acute psychiatric disturbances, seizures, memory deficits, and hypoventilation.




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.