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 52981-8: HSV IgG IA Qn (S)

Name: LOINC Code 52981-8: HSV IgG IA Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:36.029Z

52981-8 is a LOINC code used to identify HSV IgG IA 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 Herpes simplex virus 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 Herpes simplex virus 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
Method: IA

What it does not mean

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

Key facts

Herpes simplex virus IgG Ab [Units/volume] in Serum by Immunoassay
Herpes simplex virus Ab.IgG
ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; EIA; ELFA; ELISA; Enzyme immunoassay; Herp splx; HSV; IAA; ID; Immune globulin G; Immunoglobulin G; Infectious Disease; InfectiousDisease; MEIA; Microbiology; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; SR; 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

HSV IgG IA Qn (S)Herpes simplex virus IgG Ab [Units/volume] in Serum by ImmunoassayHSV IgG Ser IA-aCncHerpes simplex virus Ab.IgGMICROHerpes simplex virus (HSV) IgG antibody, BloodACnc

Frequently asked questions

Code details

Code52981-8

SystemLOINC

Display nameHSV IgG IA Qn (S)

DescriptionHerpes simplex virus Ab.IgG

Short nameHSV IgG Ser IA-aCnc

ComponentHerpes simplex virus Ab.IgG

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

MethodIA

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.24

Last changed2.69

Consumer names

Herpes simplex virus (HSV) IgG antibody, Blood

Part names

Herpes simplex virus Ab.IgGACncPtSerQnIAHerpes simplex virus IgGArbitrary ConcentrationPoint in time (spot)SerumImmunoassay

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.