LOINCActiveBoth

LOINC Code 74867-3: IgM.lambda [Mass/Vol]

74867-3 is a LOINC code used to identify IgM.lambda [Mass/Vol] 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 IgM.lambda. It is commonly used with the system or sample type Ser/Plas.

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 IgM.lambda. It is commonly used with the system or sample type Ser/Plas.

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

What it does not mean

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

Key facts

IgM.lambda [Mass/volume] in Serum or Plasma
IgM.lambda
Immunoglobulins are made up of two identical heavy chains which define the immunoglobulin class (A, G, or M) and two identical light chains, kappa or lambda (κ or λ). Each light chain is bound to a heavy chain. This test measures IgM, but selectively IgM with a lambda light chain. The assay employs antibodies that target unique junctional epitopes between the light and heavy chains for each Ig molecule. High serum concentrations of monoclonal protein may indicate an underlying abnormality such as multiple myeloma, monoclonal gammopathy of unknown significance (MGUS), or other lymphoproliferative disorders. [PMID23211046] This term was based on, but not limited in use to, the Hevylite Human IgM Lambda assay.
Chemistry; IgM lambda; Immune globulin M; Immunoglobulin M; Level; Mass concentration; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; 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

IgM.lambda [Mass/Vol]IgM.lambda [Mass/volume] in Serum or PlasmaIgM lambda SerPl-mCncIgM.lambdaCHEMIgM.lambda, BloodMCnc

Frequently asked questions

Code details

Code74867-3
SystemLOINC
Display nameIgM.lambda [Mass/Vol]
DescriptionIgM.lambda
Short nameIgM lambda SerPl-mCnc
ComponentIgM.lambda
PropertyMCnc
TimingPt
System (specimen)Ser/Plas
ScaleQn
ClassCHEM
Example unitsg/L
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.48
Last changed2.73

Consumer names

IgM.lambda, Blood

Part names

IgM.lambdaMCncPtSer/PlasQnMass ConcentrationPoint in time (spot)Serum or Plasma

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.

LOINC Code 74867-3 | HealthAssure