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.

LOINCActiveObservation

LOINC Code 44605-4: Immunoglobulin light chains.kappa Immunofixation Ql (CSF)

Name: LOINC Code 44605-4: Immunoglobulin light chains.kappa Immunofixation Ql (CSF)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

44605-4 is a LOINC code used to identify Immunoglobulin light chains.kappa Immunofixation Ql (CSF) 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. It is commonly used with the system or sample type CSF.

Reviewed by HealthAssure Clinical TeamUpdated 25 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. It is commonly used with the system or sample type CSF.

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: Immunofixation

What it does not mean

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

Key facts

Kappa light chains [Presence] in Cerebral spinal fluid by Immunofixation
Immunoglobulin light chains.kappa
Bence Jones protein; BJ Protein; BJP; Cerebral spinal fluid; Cerebrospinal Fl; Chain; Chemistry; IFE; Ifix; Immune globulin; Immuno; Immunofixation electrophoresis; Immunoglob; Immunoglobin; Imunoglbon; Imunoglobn; Kappa LC; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Immunoglobulin light chains.kappa Immunofixation Ql (CSF) (44605-4)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Immunoglobulin light chains.kappa Immunofixation Ql (CSF)Kappa light chains [Presence] in Cerebral spinal fluid by ImmunofixationKappa LC CSF Ql IFEImmunoglobulin light chains.kappaCHEMImmunoglobulin light chains.kappa, Spinal fluidPrThr

Frequently asked questions

Code details

Code44605-4

SystemLOINC

Display nameImmunoglobulin light chains.kappa Immunofixation Ql (CSF)

DescriptionImmunoglobulin light chains.kappa

Short nameKappa LC CSF Ql IFE

ComponentImmunoglobulin light chains.kappa

PropertyPrThr

TimingPt

System (specimen)CSF

ScaleOrd

MethodImmunofixation

ClassCHEM

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.17

Last changed2.63

Consumer names

Immunoglobulin light chains.kappa, Spinal fluid

Part names

Immunoglobulin light chains.kappaPrThrPtCSFOrdImmunofixationKappa light chainsPresence or ThresholdPoint in time (spot)Cerebral spinal fluid

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.