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 45179-9: Herpes gestationis IgG complement fixing IF Ql (S)

Name: LOINC Code 45179-9: Herpes gestationis IgG complement fixing IF Ql (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:30.175Z

45179-9 is a LOINC code used to identify Herpes gestationis IgG complement fixing IF Ql (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 gestationis Ab.IgG.complement fixing. 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 gestationis Ab.IgG.complement fixing. 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: IF

What it does not mean

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

Key facts

Herpes gestationis IgG Ab complement fixing [Presence] in Serum by Immunofluorescence
Herpes gestationis Ab.IgG.complement fixing
ABS; Aby; ACIF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Autoantibodies; Autoantibody; Comp; Complmt; FA; Fluorescent antibody; Fluoresent; Herpes gestationis factor; HG; HG factor; IFA; IgG CF; IMMUNE FLUORESCENCE; Immune globulin G; Immunoflour; Immunofluor; Immunofluorescence; Immunoglobulin G; Ordinal; Pemphigoid gestationis; PG; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Serology; Serum; SR; 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.

Common synonyms

Herpes gestationis IgG complement fixing IF Ql (S)Herpes gestationis IgG Ab complement fixing [Presence] in Serum by ImmunofluorescenceHG IgG CF Ser Ql IFHerpes gestationis Ab.IgG.complement fixingSEROHerpes gestationis IgG complement fixing, BloodPrThr

Frequently asked questions

Code details

Code45179-9

SystemLOINC

Display nameHerpes gestationis IgG complement fixing IF Ql (S)

DescriptionHerpes gestationis Ab.IgG.complement fixing

Short nameHG IgG CF Ser Ql IF

ComponentHerpes gestationis Ab.IgG.complement fixing

PropertyPrThr

TimingPt

System (specimen)Ser

ScaleOrd

MethodIF

ClassSERO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.17

Last changed2.56

Consumer names

Herpes gestationis IgG complement fixing, Blood

Part names

Herpes gestationis Ab.IgG.complement fixingPrThrPtSerOrdIFHerpes gestationis IgG complement fixingPresence or ThresholdPoint in time (spot)SerumImmunofluorescence (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.