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 51464-6: Onchocerca sp IgG4 Qn (S)

Name: LOINC Code 51464-6: Onchocerca sp IgG4 Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:35.012Z

51464-6 is a LOINC code used to identify Onchocerca sp IgG4 Qn (S) 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 Onchocerca sp Ab.IgG4. It is commonly used with the system or sample type Ser.

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 Onchocerca sp Ab.IgG4. It is commonly used with the system or sample type Ser.

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

Onchocerca sp IgG4 Ab [Units/volume] in Serum
Onchocerca sp Ab.IgG4
ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; Filariasis; ID; Infectious Disease; InfectiousDisease; Microbiology; Point in time; QNT; Quan; Quant; Quantitative; Random; River blindness; Serum; species; spp; 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

Onchocerca sp IgG4 Qn (S)Onchocerca sp IgG4 Ab [Units/volume] in SerumOnchocerca IgG4 Ser-aCncOnchocerca sp Ab.IgG4MICROOnchocerca sp IgG4 antibody, BloodACnc

Frequently asked questions

Code details

Code51464-6

SystemLOINC

Display nameOnchocerca sp IgG4 Qn (S)

DescriptionOnchocerca sp Ab.IgG4

Short nameOnchocerca IgG4 Ser-aCnc

ComponentOnchocerca sp Ab.IgG4

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.22

Last changed2.69

Consumer names

Onchocerca sp IgG4 antibody, Blood

Part names

Onchocerca sp Ab.IgG4ACncPtSerQnOnchocerca sp IgG4Arbitrary ConcentrationPoint in time (spot)Serum

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.