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 39543-4: Hazelnut IgE/Total IgE (S) [%]

Name: LOINC Code 39543-4: Hazelnut IgE/Total IgE (S) [%]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

39543-4 is a LOINC code used to identify Hazelnut IgE/Total IgE (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 Corylus avellana Ab.IgE/IgE.total. It is commonly used with the system or sample type Ser.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Corylus avellana Ab.IgE/IgE.total. 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

Hazelnut IgE Ab/IgE total in Serum
Corylus avellana Ab.IgE/IgE.total
%; ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Barcelona nut; Cob nut; f017; f17; Filbert; Hazel nut; Hazelnut; IgE total; Immune globulin E; Immunoglobulin E; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; SR; Tot; Total IgE; Totl

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Hazelnut IgE/Total IgE (S) [%] (39543-4)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Hazelnut IgE/Total IgE (S) [%]Hazelnut IgE Ab/IgE total in SerumHazelnut IgE/IgE total %Corylus avellana Ab.IgE/IgE.totalALLERGYHazelnut allergy testAFr

Frequently asked questions

Code details

Code39543-4

SystemLOINC

Display nameHazelnut IgE/Total IgE (S) [%]

DescriptionCorylus avellana Ab.IgE/IgE.total

Short nameHazelnut IgE/IgE total %

ComponentCorylus avellana Ab.IgE/IgE.total

PropertyAFr

TimingPt

System (specimen)Ser

ScaleQn

ClassALLERGY

Example units% response

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.15

Last changed2.73

Consumer names

Hazelnut allergy test

Part names

Corylus avellana Ab.IgE/IgE.totalAFrPtSerQnArbitrary fractionPoint 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.