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 66493-8: EBV nuclear 1 IgG Qn (S)

Name: LOINC Code 66493-8: EBV nuclear 1 IgG Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:46.209Z

66493-8 is a LOINC code used to identify EBV nuclear 1 IgG Qn (S) 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 Epstein Barr virus nuclear 1 Ab.IgG. It is commonly used with the system or sample type Ser.

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 Epstein Barr virus nuclear 1 Ab.IgG. It is commonly used with the system or sample type Ser.

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

What it does not mean

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

Key facts

Epstein Barr virus nuclear 1 IgG Ab [Units/volume] in Serum
Epstein Barr virus nuclear 1 Ab.IgG
ABS; Aby; ANA IgG; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; EBNA; EBV; EBV NA; EBV NA 1; Epstn; HHV-4; human herpesvirus 4; i; ID; Immune globulin G; Immunoglobulin G; Infectious Disease; InfectiousDisease; Microbiology; Mono; Mononucleosis; Nuc; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; SR

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

EBV nuclear 1 IgG Qn (S)Epstein Barr virus nuclear 1 IgG Ab [Units/volume] in SerumEBV NA 1 IgG Ser-aCncEpstein Barr virus nuclear 1 Ab.IgGMICROEpstein Barr virus (EBV) Nuclear 1 IgG antibody, BloodACnc

Frequently asked questions

Code details

Code66493-8

SystemLOINC

Display nameEBV nuclear 1 IgG Qn (S)

DescriptionEpstein Barr virus nuclear 1 Ab.IgG

Short nameEBV NA 1 IgG Ser-aCnc

ComponentEpstein Barr virus nuclear 1 Ab.IgG

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

ClassMICRO

Example unitsIndex

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.38

Last changed2.73

Consumer names

Epstein Barr virus (EBV) Nuclear 1 IgG antibody, Blood

Part names

Epstein Barr virus nuclear 1 Ab.IgGACncPtSerQnEpstein Barr virus nuclear 1 IgGArbitrary ConcentrationPoint in time (spot)Serum

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.