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 7645-5: Canyon Ragweed IgE Qn (S)

Name: LOINC Code 7645-5: Canyon Ragweed IgE Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:56.389Z

7645-5 is a LOINC code used to identify Canyon Ragweed 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 Ambrosia ambrosioides 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 Ambrosia ambrosioides 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

Canyon Ragweed IgE Ab [Units/volume] in Serum
Ambrosia ambrosioides Ab.IgE
ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; Canyon ragweed; Franseria ambrosioides; Immune globulin E; Immunoglobulin E; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; 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

Canyon Ragweed IgE Qn (S)Canyon Ragweed IgE Ab [Units/volume] in SerumCanyon Ragweed IgE QnAmbrosia ambrosioides Ab.IgEALLERGYCanyon ragweed allergy testACnc

Frequently asked questions

Code details

Code7645-5

SystemLOINC

Display nameCanyon Ragweed IgE Qn (S)

DescriptionAmbrosia ambrosioides Ab.IgE

Short nameCanyon Ragweed IgE Qn

ComponentAmbrosia ambrosioides 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

Canyon ragweed allergy test

Part names

Ambrosia ambrosioides Ab.IgEACncPtSerQnCanyon Ragweed (Ambrosia ambrosioides) 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.