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 107555-5: Complement C3+C4+ C1q Ab.IgG panel

Name: LOINC Code 107555-5: Complement C3+C4+ C1q Ab.IgG panel
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:20.215Z

107555-5 is a LOINC code used to identify Complement C3+C4+ C1q Ab.IgG panel 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 & C1q Ab.IgG 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 & C1q Ab.IgG 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+C4+ C1q Ab.IgG panel - Serum or Plasma
Complement C3 & C4 & C1q Ab.IgG panel
Beta 1 C-globulin; Comp; Comp C3+C4+ C1q Ab.IgG pnl; Complmt; HEMATOLOGY/CELL COUNTS; Immune globulin G; Immunoglobulin G; Pan; PANEL.HEMATOLOGY& CELL COUNTS; Panl; Pl; Plasma; Plsm; Pnl; Point in time; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR

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+C4+ C1q Ab.IgG panelComplement C3+C4+ C1q Ab.IgG panel - Serum or PlasmaComp C3+C4+ C1q Ab.IgG pnl SerPlComplement C3 & C4 & C1q Ab.IgG panelPANEL.HEM/BCComplement C3+C4+ C1q Ab.IgG panel, Blood-

Frequently asked questions

Code details

Code107555-5

SystemLOINC

Display nameComplement C3+C4+ C1q Ab.IgG panel

DescriptionComplement C3 & C4 & C1q Ab.IgG panel

Short nameComp C3+C4+ C1q Ab.IgG pnl SerPl

ComponentComplement C3 & C4 & C1q Ab.IgG panel

Property-

TimingPt

System (specimen)Ser/Plas

Scale-

ClassPANEL.HEM/BC

StatusACTIVE

Order/ObservationOrder

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.81

Last changed2.81

Consumer names

Complement C3+C4+ C1q Ab.IgG panel, Blood

Part names

Complement C3 & C4 & C1q Ab.IgG panel-PtSer/PlasComplement C3+C4+ C1q Ab.IgG panelPoint 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.