What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 6791-8: Immunoglobulin light chains.lambda IA Ql (S)

Name: LOINC Code 6791-8: Immunoglobulin light chains.lambda IA Ql (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:46.823Z

6791-8 is a LOINC code used to identify Immunoglobulin light chains.lambda IA Ql (S) 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.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.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: Both
Method: IA

What it does not mean

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

Key facts

Lambda light chains [Presence] in Serum by Immunoassay
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; Lambda LC; MEIA; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; 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.lambda IA Ql (S)Lambda light chains [Presence] in Serum by ImmunoassayLambda LC Ser Ql IAImmunoglobulin light chains.lambdaCHEMImmunoglobulin light chains.lambda, BloodPrThr

Frequently asked questions

Code details

Code6791-8

SystemLOINC

Display nameImmunoglobulin light chains.lambda IA Ql (S)

DescriptionImmunoglobulin light chains.lambda

Short nameLambda LC Ser Ql IA

ComponentImmunoglobulin light chains.lambda

PropertyPrThr

TimingPt

System (specimen)Ser

ScaleOrd

MethodIA

ClassCHEM

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0h(2)

Last changed2.63

Consumer names

Immunoglobulin light chains.lambda, Blood

Part names

Immunoglobulin light chains.lambdaPrThrPtSerOrdIALambda light chainsPresence or ThresholdPoint 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.