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.

LOINCActiveObservation

LOINC Code 101203-8: HSV 1+2 IgG index Qn (S+CSF)

Name: LOINC Code 101203-8: HSV 1+2 IgG index Qn (S+CSF)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:17.027Z

101203-8 is a LOINC code used to identify HSV 1+2 IgG index Qn (S+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 Herpes simplex virus 1+2 Ab.IgG index. It is commonly used with the system or sample type Ser+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 Herpes simplex virus 1+2 Ab.IgG index. It is commonly used with the system or sample type Ser+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: Observation

What it does not mean

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

Key facts

Herpes simplex virus 1+2 IgG Ab index [Units/volume] in Serum and CSF
Herpes simplex virus 1+2 Ab.IgG index
ABS; Aby; AI; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; Both serum and cerebrospinal fluid; Cerebral spinal fluid; Cerebrospinal Fl; Herp splx; Herpes simplex virus type 1; Herpes simplex virus type 1+2; Herpes simplex virus type I+II; HSV; HSV 1+2; HSV1; HSV1+2; i; II; Immune globulin G; Immunoglobulin G; Microbiology; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; 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

HSV 1+2 IgG index Qn (S+CSF)Herpes simplex virus 1+2 IgG Ab index [Units/volume] in Serum and CSFHSV1+2 IgG Index Ser+CSF-aCncHerpes simplex virus 1+2 Ab.IgG indexMICROHerpes simplex virus (HSV) 1+2 IgG index, Serum+Cerebrospinal fluidACnc

Frequently asked questions

Code details

Code101203-8

SystemLOINC

Display nameHSV 1+2 IgG index Qn (S+CSF)

DescriptionHerpes simplex virus 1+2 Ab.IgG index

Short nameHSV1+2 IgG Index Ser+CSF-aCnc

ComponentHerpes simplex virus 1+2 Ab.IgG index

PropertyACnc

TimingPt

System (specimen)Ser+CSF

ScaleQn

ClassMICRO

Example unitsindex value

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.74

Last changed2.75

Consumer names

Herpes simplex virus (HSV) 1+2 IgG index, Serum+Cerebrospinal fluid

Part names

Herpes simplex virus 1+2 Ab.IgG indexACncPtSer+CSFQnArbitrary ConcentrationPoint in time (spot)Serum and CSF

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.