LOINCActiveObservation

LOINC Code 44009-9: HSV 1 and 2 IgG IA (S) [Interp]

44009-9 is a LOINC code used to identify HSV 1 and 2 IgG IA (S) [Interp] 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. 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 1 & 2 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: Observation
  • Method: IA

What it does not mean

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

Key facts

  • Herpes simplex virus 1 and 2 IgG Ab [Interpretation] in Serum by Immunoassay
  • Herpes simplex virus 1 & 2 Ab.IgG
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; EIA; ELFA; ELISA; Enzyme immunoassay; 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; IAA; ID; II; Immune globulin G; Immunoglobulin G; Impression; Impression/interpretation of study; Impressions; Infectious Disease; InfectiousDisease; Interp; Interpretation; MEIA; Microbiology; Nominal; Point in time; 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 1 and 2 IgG IA (S) [Interp]Herpes simplex virus 1 and 2 IgG Ab [Interpretation] in Serum by ImmunoassayHSV 1+2 IgG Ser IA-ImpHerpes simplex virus 1 & 2 Ab.IgGMICROHerpes simplex virus (HSV) 1 and 2 IgG antibody, BloodImp

Frequently asked questions

Code details

Code44009-9
SystemLOINC
Display nameHSV 1 and 2 IgG IA (S) [Interp]
DescriptionHerpes simplex virus 1 & 2 Ab.IgG
Short nameHSV 1+2 IgG Ser IA-Imp
ComponentHerpes simplex virus 1 & 2 Ab.IgG
PropertyImp
TimingPt
System (specimen)Ser
ScaleNom
MethodIA
ClassMICRO
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.17
Last changed2.73

Consumer names

Herpes simplex virus (HSV) 1 and 2 IgG antibody, Blood

Part names

Herpes simplex virus 1 & 2 Ab.IgGImpPtSerNomIAHerpes Simplex Virus 1 and 2 IgGImpression/interpretation of studyPoint 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.

LOINC Code 44009-9 | HealthAssure