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.

LOINCObservation

LOINC Code 15851-9: Cockspur IgE RAST class (S)

Name: LOINC Code 15851-9: Cockspur IgE RAST class (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:25.874Z

15851-9 is a LOINC code used to identify Cockspur IgE RAST class (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 Echinochloa crus-galli Ab.IgE.RAST class. 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 Echinochloa crus-galli Ab.IgE.RAST class. 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: DEPRECATED
Order vs observation: Observation

What it does not mean

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

Key facts

Deprecated Cockspur IgE Ab RAST class [Presence] in Serum
Echinochloa crus-galli Ab.IgE.RAST class
ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Barnyard grass; Cockspur; f57; IgE RAST; Immune globulin E; Immunoglobulin E; Japanese millet; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; 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

Cockspur IgE RAST class (S)Deprecated Cockspur IgE Ab RAST class [Presence] in SerumDeprecated Cockspur IgE RAST QlEchinochloa crus-galli Ab.IgE.RAST classALLERGYCockspur allergy testPrThr

Frequently asked questions

Code details

Code15851-9

SystemLOINC

Display nameCockspur IgE RAST class (S)

DescriptionEchinochloa crus-galli Ab.IgE.RAST class

Short nameDeprecated Cockspur IgE RAST Ql

ComponentEchinochloa crus-galli Ab.IgE.RAST class

PropertyPrThr

TimingPt

System (specimen)Ser

ScaleOrd

ClassALLERGY

StatusDEPRECATED

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0l

Last changed2.75

Consumer names

Cockspur allergy test

Part names

Echinochloa crus-galli Ab.IgE.RAST classPrThrPtSerOrdPresence or ThresholdPoint 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.