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 57676-9: L. pneumophila IgG spec 2 IF Ql (S)

Name: LOINC Code 57676-9: L. pneumophila IgG spec 2 IF Ql (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:38.757Z

57676-9 is a LOINC code used to identify L. pneumophila IgG spec 2 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 Legionella pneumophila 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 Legionella pneumophila 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: IF

What it does not mean

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

Key facts

Legionella pneumophila IgG Ab [Presence] in Serum by Immunofluorescence --2nd specimen
Legionella pneumophila Ab.IgG^2nd specimen
ABS; Aby; ACIF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Autoantibodies; Autoantibody; Convalescent; FA; Fluorescent antibody; Fluoresent; ID; IFA; Immune fluorescence; Immune globulin G; Immunoflour; Immunofluor; Immunofluorescence; Immunoglobulin G; Infectious Disease; InfectiousDisease; L pneumo; L pneumonphila; Legion; Legionela; Microbiology; Ordinal; Pneu; pneum; Pneumophilia; Point in time; Post immunization; PR; QL; Qual; Qualitative; Random; Screen; Second; Serum; sp2; Spec; 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

L. pneumophila IgG spec 2 IF Ql (S)Legionella pneumophila IgG Ab [Presence] in Serum by Immunofluorescence --2nd specimenL pneumo IgG sp2 Ser Ql IFLegionella pneumophila Ab.IgG^2nd specimenMICROLegionella pneumophila IgG antibody specimen 2, BloodPrThr

Frequently asked questions

Code details

Code57676-9

SystemLOINC

Display nameL. pneumophila IgG spec 2 IF Ql (S)

DescriptionLegionella pneumophila Ab.IgG^2nd specimen

Short nameL pneumo IgG sp2 Ser Ql IF

ComponentLegionella pneumophila Ab.IgG^2nd specimen

PropertyPrThr

TimingPt

System (specimen)Ser

ScaleOrd

MethodIF

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.29

Last changed2.56

Consumer names

Legionella pneumophila IgG antibody specimen 2, Blood

Part names

Legionella pneumophila Ab.IgG^2nd specimenPrThrPtSerOrdIFPresence 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.