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 6921-1: CMV IgG IA Qn (CSF)

Name: LOINC Code 6921-1: CMV IgG IA Qn (CSF)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:48.045Z

6921-1 is a LOINC code used to identify CMV IgG IA Qn (CSF) 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 Cytomegalovirus 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 Cytomegalovirus 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: IA

What it does not mean

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

Key facts

Cytomegalovirus IgG Ab [Units/volume] in Cerebral spinal fluid by Immunoassay
Cytomegalovirus Ab.IgG
ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; CMV; Cytomegalo virus; Cytomgal; EIA; ELFA; ELISA; Enzyme immunoassay; HHV-5; Human Herpesvirus-5; IAA; ID; Immune globulin G; Immunoglobulin G; Infectious Disease; InfectiousDisease; MEIA; Microbiology; Neuro; Neurology; Point in time; QNT; Quan; Quant; Quantitative; Random; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; SUDS

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

CMV IgG IA Qn (CSF)Cytomegalovirus IgG Ab [Units/volume] in Cerebral spinal fluid by ImmunoassayCMV IgG CSF IA-aCncCytomegalovirus Ab.IgGMICROCytomegalovirus (CMV) IgG antibody, Spinal fluidACnc

Frequently asked questions

Code details

Code6921-1

SystemLOINC

Display nameCMV IgG IA Qn (CSF)

DescriptionCytomegalovirus Ab.IgG

Short nameCMV IgG CSF IA-aCnc

ComponentCytomegalovirus Ab.IgG

PropertyACnc

TimingPt

System (specimen)CSF

ScaleQn

MethodIA

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0h(2)

Last changed2.73

Consumer names

Cytomegalovirus (CMV) IgG antibody, Spinal fluid

Part names

Cytomegalovirus Ab.IgGACncPtCSFQnIACytomegalovirus IgGArbitrary ConcentrationPoint in time (spot)Cerebral spinal fluidImmunoassay

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.