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 6312-3: B. henselae IgM IA Qn (S)

Name: LOINC Code 6312-3: B. henselae IgM IA Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:42.801Z

6312-3 is a LOINC code used to identify B. henselae IgM 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 Bartonella henselae Ab.IgM. 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 Bartonella henselae Ab.IgM. 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

Bartonella henselae IgM Ab [Units/volume] in Serum by Immunoassay
Bartonella henselae Ab.IgM
ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; B henselae; Bacillary angiomaosis; Bacillary pelliosis; Cat Scratch Disease; Cat Scratch Fever; CSD; EIA; ELFA; ELISA; Enzyme immunoassay; IAA; ID; Immune globulin M; Immunoglobulin M; Infectious Disease; InfectiousDisease; MEIA; Microbiology; Point in time; QNT; Quan; Quant; Quantitative; R henselae; Random; Rochalimaea henselae; Serum; 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

B. henselae IgM IA Qn (S)Bartonella henselae IgM Ab [Units/volume] in Serum by ImmunoassayB henselae IgM Ser IA-aCncBartonella henselae Ab.IgMMICROBartonella henselae IgM antibody, BloodACnc

Frequently asked questions

Code details

Code6312-3

SystemLOINC

Display nameB. henselae IgM IA Qn (S)

DescriptionBartonella henselae Ab.IgM

Short nameB henselae IgM Ser IA-aCnc

ComponentBartonella henselae Ab.IgM

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

MethodIA

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0f

Last changed2.69

Consumer names

Bartonella henselae IgM antibody, Blood

Part names

Bartonella henselae Ab.IgMACncPtSerQnIABartonella henselae IgMArbitrary 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.