What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 80220-7: NMDAR IgG IF (CSF) [Titer]

Name: LOINC Code 80220-7: NMDAR IgG IF (CSF) [Titer]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:01.839Z

80220-7 is a LOINC code used to identify NMDAR IgG IF (CSF) [Titer] in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. 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 Ab.IgG. It is commonly used with the system or sample type CSF.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

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 Ab.IgG. 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: IF

What it does not mean

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

Key facts

NMDAR IgG Ab [Titer] in Cerebral spinal fluid by Immunofluorescence
N-methyl-D-aspartate receptor Ab.IgG
Semi-quanitative analysis of N-methyl-D-aspartate receptor IgG antibodies in CSF specimens to confirm the diagnosis of anti-NMDAR autoimmune encephalitis in conjunction with other laboratory and clinical findings. This test may also be used to monitor treatment response in individuals who are antibody positive. This term was created for, but not limited in use to, the EUROIMMUN Anti-Glutamate receptor (type NMDA) IFA assay.
ABS; Aby; ACIF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Asp; Aspartic acid; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; Dextro; Dilution factor; Dilution Factor (Titer); Encephalitis; FA; Fluorescent antibody; Fluoresent; IFA; Immune fluorescence; Immune globulin G; Immunoflour; Immunofluor; Immunofluorescence; Immunoglobulin G; NMDA receptor; NMDAR; N-Methylaspartate Receptors; N-Methyl-D-aspartic Acid; Point in time; Random; Rec; Recept; Receptors; Recp; Recptr; Serology; SmQn; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Time Resolved Fluorescence; Titer; Titered; Titre; TRF; 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

NMDAR IgG IF (CSF) [Titer]NMDAR IgG Ab [Titer] in Cerebral spinal fluid by ImmunofluorescenceNMDAR IgG Titr CSF IFN-methyl-D-aspartate receptor Ab.IgGSERONMDAR IgG antibody, Spinal fluidTitr

Frequently asked questions

Code details

Code80220-7

SystemLOINC

Display nameNMDAR IgG IF (CSF) [Titer]

DescriptionN-methyl-D-aspartate receptor Ab.IgG

Short nameNMDAR IgG Titr CSF IF

ComponentN-methyl-D-aspartate receptor Ab.IgG

PropertyTitr

TimingPt

System (specimen)CSF

ScaleSemiQn

MethodIF

ClassSERO

Example unitstiter

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.54

Last changed2.75

Consumer names

NMDAR IgG antibody, Spinal fluid

Part names

N-methyl-D-aspartate receptor Ab.IgGTitrPtCSFSemiQnIFNMDAR IgGTiterPoint in time (spot)Cerebral spinal fluidImmunofluorescence (IF)

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.