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.

LOINCActiveObservation

LOINC Code 42729-4: Cardiolipin IgA B2GP1 dependent (S) [MoM]

Name: LOINC Code 42729-4: Cardiolipin IgA B2GP1 dependent (S) [MoM]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:28.128Z

42729-4 is a LOINC code used to identify Cardiolipin IgA B2GP1 dependent (S) [MoM] 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 Cardiolipin Ab.IgA.B2GP1 dependent. 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 Cardiolipin Ab.IgA.B2GP1 dependent. 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: Observation

What it does not mean

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

Key facts

Cardiolipin IgA Ab B2GP1 dependent [Multiple of the median] in Serum
Cardiolipin Ab.IgA.B2GP1 dependent
ABS; Aby; ACA; aCL; Antby; Anti; Antibodies; Antibody; Anticardiolipin; Autoantibodies; Autoantibody; Beta 2 Glycoprotein 1; Cardio; Cardiolip; Cardiolipn; Cardiolpn; CL; COAGULATION; Hematology; Heme; IgA B2GP1 dep; Immune globulin A; Immunoglobulin A; MoM; Multiple of the median; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; SR

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

Cardiolipin IgA B2GP1 dependent (S) [MoM]Cardiolipin IgA Ab B2GP1 dependent [Multiple of the median] in SerumCardiolipin IgA B2GP1 dep MoM SerCardiolipin Ab.IgA.B2GP1 dependentCOAGCardiolipin IgA B2GP1 dependent, BloodMoM

Frequently asked questions

Code details

Code42729-4

SystemLOINC

Display nameCardiolipin IgA B2GP1 dependent (S) [MoM]

DescriptionCardiolipin Ab.IgA.B2GP1 dependent

Short nameCardiolipin IgA B2GP1 dep MoM Ser

ComponentCardiolipin Ab.IgA.B2GP1 dependent

PropertyMoM

TimingPt

System (specimen)Ser

ScaleQn

ClassCOAG

Example unitsM.o.M

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.16

Last changed2.70

Consumer names

Cardiolipin IgA B2GP1 dependent, Blood

Part names

Cardiolipin Ab.IgA.B2GP1 dependentMoMPtSerQnCardiolipin IgA B2GP1 dependentMultiple of the medianPoint in time (spot)Serum

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.