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.

LOINCActiveOrder

LOINC Code 34544-7: Complement C3 and C4 panel [Mass/Vol]

Name: LOINC Code 34544-7: Complement C3 and C4 panel [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:22.384Z

34544-7 is a LOINC code used to identify Complement C3 and C4 panel [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 & C4 panel. It is commonly used with the system or sample type Ser/Plas.

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 & C4 panel. It is commonly used with the system or sample type Ser/Plas.

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: Order
Panel type: Panel

What it does not mean

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

Key facts

Complement C3 and C4 panel [Mass/volume] - Serum or Plasma
Complement C3 & C4 panel
Beta 1 C-globulin; Comp; Comp C3 + C4 Pnl; Complmt; HEMATOLOGY/CELL COUNTS; Level; Mass concentration; Pan; PANEL.HEMATOLOGY& CELL COUNTS; Panl; Pl; Plasma; Plsm; Pnl; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; UniversalLabOrders

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 and C4 panel [Mass/Vol]Complement C3 and C4 panel [Mass/volume] - Serum or PlasmaComp C3 + C4 Pnl SerPl-mCncComplement C3 & C4 panelPANEL.HEM/BCComplement C3 and C4 Panel, BloodMCnc

Frequently asked questions

Code details

Code34544-7

SystemLOINC

Display nameComplement C3 and C4 panel [Mass/Vol]

DescriptionComplement C3 & C4 panel

Short nameComp C3 + C4 Pnl SerPl-mCnc

ComponentComplement C3 & C4 panel

PropertyMCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassPANEL.HEM/BC

StatusACTIVE

Order/ObservationOrder

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.10

Last changed2.73

Consumer names

Complement C3 and C4 Panel, Blood

Part names

Complement C3 & C4 panelMCncPtSer/PlasQnComplement C3 and C4 panelMass ConcentrationPoint in time (spot)Serum or Plasma

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.