LOINCActiveObservation

LOINC Code 102149-2: Arizona Ash IgE RAST (S) [Presence]

102149-2 is a LOINC code used to identify Arizona Ash IgE RAST (S) [Presence] 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 Fraxinus velutina 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 Fraxinus velutina 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: Observation
  • Method: RAST

What it does not mean

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

Key facts

  • Arizona Ash IgE Ab [Presence] in Serum by Radioallergosorbent test (RAST)
  • Fraxinus velutina Ab.IgE
  • ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Arizona ash; Autoantibodies; Autoantibody; Immune globulin E; Immunoglobulin E; Point in time; PR; Radioallergosorbent test; Random; Serum; SmQn; SR; t33

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

Arizona Ash IgE RAST (S) [Presence]Arizona Ash IgE Ab [Presence] in Serum by Radioallergosorbent test (RAST)Arizona Ash IgE RASTFraxinus velutina Ab.IgEALLERGYArizona ash allergy testPrThr

Frequently asked questions

Code details

Code102149-2
SystemLOINC
Display nameArizona Ash IgE RAST (S) [Presence]
DescriptionFraxinus velutina Ab.IgE
Short nameArizona Ash IgE RAST
ComponentFraxinus velutina Ab.IgE
PropertyPrThr
TimingPt
System (specimen)Ser
ScaleSemiQn
MethodRAST
ClassALLERGY
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.75
Last changed2.75

Consumer names

Arizona ash allergy test

Part names

Fraxinus velutina Ab.IgEPrThrPtSerSemiQnRASTArizona Ash (Fraxinus velutina) IgEPresence or ThresholdPoint in time (spot)SerumRadioallergosorbent test (RAST)

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.

LOINC Code 102149-2 | HealthAssure