LOINCActiveBoth

LOINC Code 74864-0: IgA.kappa [Mass/Vol]

74864-0 is a LOINC code used to identify IgA.kappa [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 IgA.kappa. 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 IgA.kappa. 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

IgA.kappa [Mass/volume] in Serum or Plasma
IgA.kappa
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 IgA, but selectively IgA with a kappa light chain. The assay employs antibodies that target unique junctional epitopes between the light and heavy chains for each IgA 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 IgA Kappa assay.
Chemistry; heavy chain; IgA kappa; Immune globulin A; Immunoglobulin A; 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

IgA.kappa [Mass/Vol]IgA.kappa [Mass/volume] in Serum or PlasmaIgA kappa SerPl-mCncIgA.kappaCHEMIgA.kappa, BloodMCnc

Frequently asked questions

Code details

Code74864-0
SystemLOINC
Display nameIgA.kappa [Mass/Vol]
DescriptionIgA.kappa
Short nameIgA kappa SerPl-mCnc
ComponentIgA.kappa
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

IgA.kappa, Blood

Part names

IgA.kappaMCncPtSer/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 74864-0 | HealthAssure