LOINCActiveObservation

LOINC Code 6788-4: Immunoglobulin light chains.kappa/Immunoglobulin light chains.lambda IA (S) [Mass ratio]

6788-4 is a LOINC code used to identify Immunoglobulin light chains.kappa/Immunoglobulin light chains.lambda IA (S) [Mass ratio] 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 Immunoglobulin light chains.kappa/Immunoglobulin light chains.lambda. 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 Immunoglobulin light chains.kappa/Immunoglobulin light chains.lambda. 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
  • Method: IA

What it does not mean

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

Key facts

  • Kappa light chains/Lambda light chains [Mass Ratio] in Serum by Immunoassay
  • Immunoglobulin light chains.kappa/Immunoglobulin light chains.lambda
  • Bence Jones protein; BJ Protein; BJP; Chain; Chemistry; EIA; ELFA; ELISA; Enzyme immunoassay; Hematology; Heme; IAA; Immune globulin; Immuno; Immunoglob; Immunoglobin; Imunoglbon; Imunoglobn; Kappa LC; Lambda LC; Mass concentration ratio; Mass ratio; MCRto; MEIA; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; SR; SUDS

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

Immunoglobulin light chains.kappa/Immunoglobulin light chains.lambda IA (S) [Mass ratio]Kappa light chains/Lambda light chains [Mass Ratio] in Serum by ImmunoassayKappa LC/Lambda Ser IAImmunoglobulin light chains.kappa/Immunoglobulin light chains.lambdaCHEMImmunoglobulin light chains.kappa/Immunoglobulin Light Chains.lambda, BloodMRto

Frequently asked questions

Code details

Code6788-4
SystemLOINC
Display nameImmunoglobulin light chains.kappa/Immunoglobulin light chains.lambda IA (S) [Mass ratio]
DescriptionImmunoglobulin light chains.kappa/Immunoglobulin light chains.lambda
Short nameKappa LC/Lambda Ser IA
ComponentImmunoglobulin light chains.kappa/Immunoglobulin light chains.lambda
PropertyMRto
TimingPt
System (specimen)Ser
ScaleQn
MethodIA
ClassCHEM
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0h(2)
Last changed2.73

Consumer names

Immunoglobulin light chains.kappa/Immunoglobulin Light Chains.lambda, Blood

Part names

Immunoglobulin light chains.kappa/Immunoglobulin light chains.lambdaMRtoPtSerQnIAMass RatioPoint in time (spot)SerumImmunoassay

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 6788-4 | HealthAssure