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 26715-3: C. trachomatis IgG IA Qn (S)

Name: LOINC Code 26715-3: C. trachomatis IgG IA Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:14.096Z

26715-3 is a LOINC code used to identify C. trachomatis IgG IA Qn (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 trachomatis 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 Chlamydia trachomatis 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: Both
Method: IA

What it does not mean

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

Key facts

Chlamydia trachomatis IgG Ab [Units/volume] in Serum by Immunoassay
Chlamydia trachomatis Ab.IgG
ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; C trac; C trach; C tracho; C trachomatis; Chlam; Chlam trac; Chlamid; CT; EIA; ELFA; ELISA; Enzyme immunoassay; IAA; ID; Immune globulin G; Immunoglobulin G; Infectious Disease; InfectiousDisease; LGV; Lymphogranuloma venereum; MEIA; Microbiology; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; SR; SUDS; Trachoma

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

C. trachomatis IgG IA Qn (S)Chlamydia trachomatis IgG Ab [Units/volume] in Serum by ImmunoassayC trach IgG Ser IA-aCncChlamydia trachomatis Ab.IgGMICROChlamydia trachomatis IgG antibody, BloodACnc

Frequently asked questions

Code details

Code26715-3

SystemLOINC

Display nameC. trachomatis IgG IA Qn (S)

DescriptionChlamydia trachomatis Ab.IgG

Short nameC trach IgG Ser IA-aCnc

ComponentChlamydia trachomatis Ab.IgG

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

MethodIA

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.00

Last changed2.69

Consumer names

Chlamydia trachomatis IgG antibody, Blood

Part names

Chlamydia trachomatis Ab.IgGACncPtSerQnIAChlamydia trachomatis IgGArbitrary ConcentrationPoint 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.