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 4487-5: Complement C3 fragment (RBC) [Mass/Vol]

Name: LOINC Code 4487-5: Complement C3 fragment (RBC) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:30.174Z

4487-5 is a LOINC code used to identify Complement C3 fragment (RBC) [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 Complement C3 fragment. It is commonly used with the system or sample type RBC.

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 Complement C3 fragment. It is commonly used with the system or sample type RBC.

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

Complement C3 fragment [Mass/volume] in Red Blood Cells
Complement C3 fragment
Beta 1 C-globulin; C3 Frg; Comp; Complmt; Erythrocytes; Frag; Fragments; HEMATOLOGY/CELL COUNTS; Level; Mass concentration; Point in time; QNT; Quan; Quant; Quantitative; Random; Red blood cells; Red blood corpusles

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

Complement C3 fragment (RBC) [Mass/Vol]Complement C3 fragment [Mass/volume] in Red Blood CellsC3 Frg RBC-mCncComplement C3 fragmentHEM/BCComplement C3 Fragment, Red blood cellsMCnc

Frequently asked questions

Code details

Code4487-5

SystemLOINC

Display nameComplement C3 fragment (RBC) [Mass/Vol]

DescriptionComplement C3 fragment

Short nameC3 Frg RBC-mCnc

ComponentComplement C3 fragment

PropertyMCnc

TimingPt

System (specimen)RBC

ScaleQn

ClassHEM/BC

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.73

Consumer names

Complement C3 Fragment, Red blood cells

Part names

Complement C3 fragmentMCncPtRBCQnMass ConcentrationPoint in time (spot)Red Blood Cells

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.