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 57321-2: HSV 2 IgG spec 2 IA Qn (S)

Name: LOINC Code 57321-2: HSV 2 IgG spec 2 IA Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:38.756Z

57321-2 is a LOINC code used to identify HSV 2 IgG spec 2 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 2 Ab.IgG^2nd specimen. 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 2 Ab.IgG^2nd specimen. 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 2 IgG Ab [Units/volume] in Serum by Immunoassay --2nd specimen
Herpes simplex virus 2 Ab.IgG^2nd specimen
ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; Convalescent; EIA; ELFA; ELISA; Enzyme immunoassay; Herp splx; Herpes simplex virus type 2; Herpes simplex virus type II; HSV; HSV2; IAA; ID; II; Immune globulin G; Immunoglobulin G; Infectious Disease; InfectiousDisease; MEIA; Microbiology; Point in time; Post immunization; QNT; Quan; Quant; Quantitative; Random; Second; Serum; sp2; Spec; 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 2 IgG spec 2 IA Qn (S)Herpes simplex virus 2 IgG Ab [Units/volume] in Serum by Immunoassay --2nd specimenHSV2 IgG sp2 Ser IA-aCncHerpes simplex virus 2 Ab.IgG^2nd specimenMICROHerpes simplex virus 2 (HSV 2) IgG antibody specimen 2, BloodACnc

Frequently asked questions

Code details

Code57321-2

SystemLOINC

Display nameHSV 2 IgG spec 2 IA Qn (S)

DescriptionHerpes simplex virus 2 Ab.IgG^2nd specimen

Short nameHSV2 IgG sp2 Ser IA-aCnc

ComponentHerpes simplex virus 2 Ab.IgG^2nd specimen

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

MethodIA

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.29

Last changed2.69

Consumer names

Herpes simplex virus 2 (HSV 2) IgG antibody specimen 2, Blood

Part names

Herpes simplex virus 2 Ab.IgG^2nd specimenACncPtSerQnIAArbitrary 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.