LOINCActiveBoth

LOINC Code 74863-2: IgG.lambda [Mass/Vol]

74863-2 is a LOINC code used to identify IgG.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 IgG.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 IgG.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

IgG.lambda [Mass/volume] in Serum or Plasma
IgG.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 IgG, but selectively IgG 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 IgG lambda assay.
Chemistry; heavy chain; IgG lamba; Immune globulin G; Immunoglobulin G; 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

IgG.lambda [Mass/Vol]IgG.lambda [Mass/volume] in Serum or PlasmaIgG lamba SerPl-mCncIgG.lambdaCHEMIgG.lambda, BloodMCnc

Frequently asked questions

Code details

Code74863-2
SystemLOINC
Display nameIgG.lambda [Mass/Vol]
DescriptionIgG.lambda
Short nameIgG lamba SerPl-mCnc
ComponentIgG.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

IgG.lambda, Blood

Part names

IgG.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 74863-2 | HealthAssure