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 57679-3: Chlamydia sp IgG spec 1 IA Ql (S)

Name: LOINC Code 57679-3: Chlamydia sp IgG spec 1 IA Ql (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:38.757Z

57679-3 is a LOINC code used to identify Chlamydia sp IgG spec 1 IA 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 Chlamydia sp Ab.IgG^1st 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 Chlamydia sp Ab.IgG^1st 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: IA

What it does not mean

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

Key facts

Chlamydia sp IgG Ab [Presence] in Serum by Immunoassay --1st specimen
Chlamydia sp Ab.IgG^1st specimen
ABS; Aby; Acute specimen; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Chlam; Chlamid; EIA; ELFA; ELISA; Enzyme immunoassay; First; IAA; ID; Immune globulin G; Immunoglobulin G; Infectious Disease; InfectiousDisease; MEIA; Microbiology; Ordinal; Point in time; PR; Pre immunization; QL; Qual; Qualitative; Random; Screen; Serum; sp1; Spec; species; spp; 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

Chlamydia sp IgG spec 1 IA Ql (S)Chlamydia sp IgG Ab [Presence] in Serum by Immunoassay --1st specimenChlamydia IgG sp1 Ser Ql IAChlamydia sp Ab.IgG^1st specimenMICROChlamydia sp IgG antibody specimen 1, BloodPrThr

Frequently asked questions

Code details

Code57679-3

SystemLOINC

Display nameChlamydia sp IgG spec 1 IA Ql (S)

DescriptionChlamydia sp Ab.IgG^1st specimen

Short nameChlamydia IgG sp1 Ser Ql IA

ComponentChlamydia sp Ab.IgG^1st specimen

PropertyPrThr

TimingPt

System (specimen)Ser

ScaleOrd

MethodIA

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.29

Last changed2.56

Consumer names

Chlamydia sp IgG antibody specimen 1, Blood

Part names

Chlamydia sp Ab.IgG^1st specimenPrThrPtSerOrdIAPresence or ThresholdPoint 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.