LOINC Code 74868-1: IgG.kappa/IgG.lambda [Mass ratio]

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.kappa/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.kappa/IgG.lambda [Mass Ratio] in Serum or Plasma
• IgG.kappa/IgG.lambda
• Measuring both the IgGκ and IgGλ, calculating the IgGκ/IgGλ ratio, and then comparing with normal subjects levels may provide a more sensitive indication of clonality. Usage of the IgGκ/IgGλ ratio may also compensate for any fluctuations in plasma volume and adjust for half-life variations. This term was based on, but not limited in use to, the Hevylite Human IgG Kappa and Lambda assays.
• Chemistry; G lambda; heavy chain; IgG Kappa; IgG lamba; Immune globulin G; Immunoglobulin G; Mass concentration ratio; Mass ratio; MCRto; 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

Frequently asked questions