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 77956-1: Y. enterocolitica O:3 IgG Aggl Ql (S)

Name: LOINC Code 77956-1: Y. enterocolitica O:3 IgG Aggl Ql (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:58.755Z

77956-1 is a LOINC code used to identify Y. enterocolitica O:3 IgG Aggl 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 Yersinia enterocolitica O:3 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 Yersinia enterocolitica O:3 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: Aggl

What it does not mean

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

Key facts

Yersinia enterocolitica O3 IgG Ab [Presence] in Serum by Agglutination

Yersinia enterocolitica O3 Ab.IgG

In the US and Europe Y. enterocolitica O3 is the serotype most frequently implicated in disease. Pork is thought to be an important source of this infection. This term was created for, but not limited in use to, the submitter's Yersinia Serology Detection of Anti-Yersinia Antibodies in Human Serum test kit.

ABS; Aby; Agg; Agglut; Agglutination; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; ID; III; Immune globulin G; Immunoglobulin G; Infectious Disease; InfectiousDisease; Microbiology; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Serum; SR; Y entero O3; Y entero O:3 Ab; Y entero O:3 IgG; Y enterocol; Y enterocolitica

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

Y. enterocolitica O:3 IgG Aggl Ql (S)Yersinia enterocolitica O:3 IgG Ab [Presence] in Serum by AgglutinationY entero O:3 IgG Ser Ql AgglYersinia enterocolitica O:3 Ab.IgGMICROYersinia enterocolitica O:3 IgG antibody, BloodPrThr

Frequently asked questions

Code details

Code77956-1

SystemLOINC

Display nameY. enterocolitica O:3 IgG Aggl Ql (S)

DescriptionYersinia enterocolitica O:3 Ab.IgG

Short nameY entero O:3 IgG Ser Ql Aggl

ComponentYersinia enterocolitica O:3 Ab.IgG

PropertyPrThr

TimingPt

System (specimen)Ser

ScaleOrd

MethodAggl

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.52

Last changed2.61

Consumer names

Yersinia enterocolitica O:3 IgG antibody, Blood

Part names

Yersinia enterocolitica O:3 Ab.IgGPrThrPtSerOrdAgglYersinia enterocolitica O:3 IgGPresence or ThresholdPoint in time (spot)SerumAgglutination

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.