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 44504-9: HSV Ab IF Ql (Body fld)

Name: LOINC Code 44504-9: HSV Ab IF Ql (Body fld)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

44504-9 is a LOINC code used to identify HSV Ab IF Ql (Body fld) 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. It is commonly used with the system or sample type Body fld.

Reviewed by HealthAssure Clinical TeamUpdated 25 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. It is commonly used with the system or sample type Body fld.

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: IF

What it does not mean

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

Key facts

Herpes simplex virus Ab [Presence] in Body fluid by Immunofluorescence
Herpes simplex virus Ab
ABS; Aby; ACIF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Autoantibodies; Autoantibody; B/F; BF; bod; Bodies; Body fluid; Body fluid, unsp; FA; Fl; Fld; FLU; Fluid; Fluorescent antibody; Fluoresent; Herp splx; HSV; ID; IFA; Immune fluorescence; Immunoflour; Immunofluor; Immunofluorescence; Infectious Disease; InfectiousDisease; Microbiology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Time Resolved Fluorescence; TRF

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for HSV Ab IF Ql (Body fld) (44504-9)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

HSV Ab IF Ql (Body fld)Herpes simplex virus Ab [Presence] in Body fluid by ImmunofluorescenceHSV Ab Fld Ql IFHerpes simplex virus AbMICROHerpes simplex virus (HSV) antibody, Body fluidPrThr

Frequently asked questions

Code details

Code44504-9

SystemLOINC

Display nameHSV Ab IF Ql (Body fld)

DescriptionHerpes simplex virus Ab

Short nameHSV Ab Fld Ql IF

ComponentHerpes simplex virus Ab

PropertyPrThr

TimingPt

System (specimen)Body fld

ScaleOrd

MethodIF

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.17

Last changed2.56

Consumer names

Herpes simplex virus (HSV) antibody, Body fluid

Part names

Herpes simplex virus AbPrThrPtBody fldOrdIFPresence or ThresholdPoint in time (spot)Body fluidImmunofluorescence (IF)

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.