LOINC Code 90840-0: NMDAR subunit 1 Ab Cell binding immunofluorescent assay (CSF) [Titer]

What is this code?

LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component N-methyl-D-aspartate receptor subunit 1 Ab. It is commonly used with the system or sample type CSF.

When is it used?

• Used in lab systems, EHRs, and clinical data exchange.
• May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
• Status: ACTIVE
• Order vs observation: Both
• Method: CBA IFA

What it does not mean

• The code identifies the observation or test, not the actual result.

Key facts

• NMDAR subunit 1 Ab [Titer] in Cerebral spinal fluid by Cell binding immunofluorescent assay
• N-methyl-D-aspartate receptor subunit 1 Ab
• ABS; Aby; Antby; Anti; Antibodies; Antibody; Asp; Aspartic acid; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; Dextro; Dilution factor; Dilution Factor (Titer); Encephalitis; Glutamate receptor ionotropic, NMDA 1; i; Indirect Fluorescence Antibody; NMDA receptor; NMDAR; NMDAR1; N-Methylaspartate Receptors; N-Methyl-D-aspartic Acid; Paraneoplastic syndrome; Point in time; Random; Rec; Recept; Receptors; Recp; Recptr; Serology; SmQn; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Titer; Titered; Titre; Ttr

Where you may see this code

You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.

Common synonyms

Frequently asked questions