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.

LOINCActiveObservation

LOINC Code 112156-5: Common ragweed (Ambrosia artemisiifolia) IgE IA Qn

Name: LOINC Code 112156-5: Common ragweed (Ambrosia artemisiifolia) IgE IA Qn
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:22.498Z

112156-5 is a LOINC code used to identify Common ragweed (Ambrosia artemisiifolia) IgE IA Qn 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 artemisiifolia Ab.IgE. It is commonly used with the system or sample type Ser/Plas.

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 artemisiifolia Ab.IgE. It is commonly used with the system or sample type Ser/Plas.

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: Observation
Method: IA

What it does not mean

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

Key facts

Common ragweed (Ambrosia artemisiifolia) IgE Ab [Units/volume] in Serum or Plasma by Immunoassay
Ambrosia artemisiifolia Ab.IgE
ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; Common ragweed; EIA; ELFA; ELISA; Enzyme immunoassay; IAA; Immune globulin E; Immunoglobulin E; MEIA; Pl; Plasma; Plsm; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; SUDS

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

Common ragweed (Ambrosia artemisiifolia) IgE IA QnCommon ragweed (Ambrosia artemisiifolia) IgE Ab [Units/volume] in Serum or Plasma by ImmunoassayCommon Ragweed IgE Qn IAAmbrosia artemisiifolia Ab.IgEALLERGYCommon Ragweed (Ambrosia Artemisiifolia) allergy test, BloodACnc

Frequently asked questions

Code details

Code112156-5

SystemLOINC

Display nameCommon ragweed (Ambrosia artemisiifolia) IgE IA Qn

DescriptionAmbrosia artemisiifolia Ab.IgE

Short nameCommon Ragweed IgE Qn IA

ComponentAmbrosia artemisiifolia Ab.IgE

PropertyACnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

MethodIA

ClassALLERGY

Example unitskUA/L

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.82

Last changed2.82

Consumer names

Common Ragweed (Ambrosia Artemisiifolia) allergy test, Blood

Part names

Ambrosia artemisiifolia Ab.IgEACncPtSer/PlasQnIAArbitrary ConcentrationPoint in time (spot)Serum or PlasmaImmunoassay

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.