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 33879-8: Protein.monoclonal Immunofixation (Specimen) [Mass/Vol]

Name: LOINC Code 33879-8: Protein.monoclonal Immunofixation (Specimen) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

33879-8 is a LOINC code used to identify Protein.monoclonal Immunofixation (Specimen) [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 Protein.monoclonal. It is commonly used with the system or sample type XXX.

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 Protein.monoclonal. It is commonly used with the system or sample type XXX.

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

Protein.monoclonal [Mass/volume] in Specimen by Immunofixation
Protein.monoclonal
Chemistry; IFE; Ifix; Immunofixation electrophoresis; Level; M Protein; Mass Concentration; M-band; Misc; Miscellaneous; Monoclonal band; Monoclonal spike; M-protein; M-spike; Other; Para protein; Paraprotein; Point in time; PR; Prot; QNT; Quan; Quant; Quantitative; Random; Spec; To be specified in another part of the message; Unspecified

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 Protein.monoclonal Immunofixation (Specimen) [Mass/Vol] (33879-8)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Protein.monoclonal Immunofixation (Specimen) [Mass/Vol]Protein.monoclonal [Mass/volume] in Specimen by ImmunofixationM Protein Spec IFE-mCncProtein.monoclonalCHEMProtein.monoclonal, SpecimenMCnc

Frequently asked questions

Code details

Code33879-8

SystemLOINC

Display nameProtein.monoclonal Immunofixation (Specimen) [Mass/Vol]

DescriptionProtein.monoclonal

Short nameM Protein Spec IFE-mCnc

ComponentProtein.monoclonal

PropertyMCnc

TimingPt

System (specimen)XXX

ScaleQn

MethodImmunofixation

ClassCHEM

Example unitsug/uL

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.09

Last changed2.73

Consumer names

Protein.monoclonal, Specimen

Part names

Protein.monoclonalMCncPtXXXQnImmunofixationMass ConcentrationPoint in time (spot)

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.