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 14275-2: Immune complex C3b binding assay Qn

Name: LOINC Code 14275-2: Immune complex C3b binding assay Qn
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:24.421Z

14275-2 is a LOINC code used to identify Immune complex C3b binding assay Qn 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 Immune complex. 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 Immune complex. 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: Both
Method: C3b binding assay

What it does not mean

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

Key facts

Immune complex [Units/volume] in Serum or Plasma by C3b binding assay
Immune complex
Arbitrary concentration; Bind; CIC; Circulating immune complex; Compx; IC; Imm; Imun; Imune; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; Serology; 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

Immune complex C3b binding assay QnImmune complex [Units/volume] in Serum or Plasma by C3b binding assayIC SerPl C3B Bind-aCncImmune complexSEROImmune complex, BloodACnc

Frequently asked questions

Code details

Code14275-2

SystemLOINC

Display nameImmune complex C3b binding assay Qn

DescriptionImmune complex

Short nameIC SerPl C3B Bind-aCnc

ComponentImmune complex

PropertyACnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

MethodC3b binding assay

ClassSERO

Example unitsug Eq/mL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0k

Last changed2.70

Consumer names

Immune complex, Blood

Part names

Immune complexACncPtSer/PlasQnC3b binding assayArbitrary 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.