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 7769-3: Water Chestnut IgE Qn (S)

Name: LOINC Code 7769-3: Water Chestnut IgE Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:58.754Z

7769-3 is a LOINC code used to identify Water Chestnut IgE 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 Trapa natans Ab.IgE. 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 Trapa natans Ab.IgE. 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

Water Chestnut IgE Ab [Units/volume] in Serum
Trapa natans Ab.IgE
Not related to chestnut genus (Castanea)
ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; Immune globulin E; Immunoglobulin E; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; SR; Trapa bicornis; Water chestnut

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

Water Chestnut IgE Qn (S)Water Chestnut IgE Ab [Units/volume] in SerumWater Chestnut IgE QnTrapa natans Ab.IgEALLERGYWater chestnut allergy testACnc

Frequently asked questions

Code details

Code7769-3

SystemLOINC

Display nameWater Chestnut IgE Qn (S)

DescriptionTrapa natans Ab.IgE

Short nameWater Chestnut IgE Qn

ComponentTrapa natans Ab.IgE

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

ClassALLERGY

Example unitskIU/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0h(2)

Last changed2.42

Consumer names

Water chestnut allergy test

Part names

Trapa natans Ab.IgEACncPtSerQnWater Chestnut (Trapa natans) IgEArbitrary 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.