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.

LOINCBoth

LOINC Code 7403-9: Hickory triggered histamine release Qn (Bld)

Name: LOINC Code 7403-9: Hickory triggered histamine release Qn (Bld)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:53.973Z

7403-9 is a LOINC code used to identify Hickory triggered histamine release Qn (Bld) 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 Hickory basophil bound Ab. It is commonly used with the system or sample type Bld.

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 Hickory basophil bound Ab. It is commonly used with the system or sample type Bld.

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: DEPRECATED
Order vs observation: Both
Method: LHR

What it does not mean

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

Key facts

Deprecated Hickory basophil bound Ab
Hickory basophil bound Ab
ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Associated; Autoantibodies; Autoantibody; Baso; BasoBnd Ab; Basophil release; Basophils; Basos; Blood; bnd; Bph; Leukocyte histamine reaction; Leukocyte histamine release; Point in time; QNT; Quan; Quant; Quantitative; Random; WB; WBC release; Whole blood

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

Hickory triggered histamine release Qn (Bld)Deprecated Hickory basophil bound AbDeprecated Hickory BasoBnd Ab QnHickory basophil bound AbALLERGYHickory triggered histamine release, BloodACnc

Frequently asked questions

Code details

Code7403-9

SystemLOINC

Display nameHickory triggered histamine release Qn (Bld)

DescriptionHickory basophil bound Ab

Short nameDeprecated Hickory BasoBnd Ab Qn

ComponentHickory basophil bound Ab

PropertyACnc

TimingPt

System (specimen)Bld

ScaleQn

MethodLHR

ClassALLERGY

StatusDEPRECATED

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0h(2)

Last changed2.69

Consumer names

Hickory triggered histamine release, Blood

Part names

Hickory basophil bound AbACncPtBldQnLHRArbitrary ConcentrationPoint in time (spot)BloodLeukocyte histamine release

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.