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Test Code NMDAIGG N-methyl-D-Aspartate Receptor Antibody, IgG, Serum with Reflex to Titer (NMDR)

Performing Laboratory

ARUP Laboratories


Semi-Quantitative Indirect Fluorescent Antibody

Specimen Required

Container/Tube: Gold top tube

Specimen: 1 mL serum ( 0.2 mL min)

Transport Temperature: Refrigerated.


Note: Separate serum from cells ASAP or within 2 hours of collection

Reference Values

< 1:10  


If NMDA antibody IgG is positive, then an NMDA antibody IgG titer is reported. Additional charges apply.

Test Classification and CPT Coding

86255; if reflexed, add 86256


Test performed Tuesday and Friday

TAT 2 - 6 Days

Day(s) and Time(s) Performed

Tuesday and Friday

Useful For

Anti-NMDA receptor IgG antibody is found in a subset of patients with autoimmune limbic encephalitis and may occur with or without associated tumor. Decreasing antibody levels may be associated with therapeutic response; therefore, clinical correlation must be strongly considered. A negative test result does not rule out a diagnosis of autoimmune limbic encephalitis.  

Computer Interface Code

PDM #  1559013