LOINCObservation

LOINC Code 15608-3: Cat IgE RAST class (S)

15608-3 is a LOINC code used to identify Cat 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 Cat 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 Cat 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 Cat IgE Ab RAST class in Serum
  • Cat Ab.IgE.RAST class
  • We reviewed the major allergy testing manufacturers and found that they all use the same allergen code, e1, but use different test descriptions (dander, epithelium, hair)
  • ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; Feline; Felis domesticus; IgE RAST; Immune globulin E; Immunoglobulin E; Ordinal; Point in time; 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

Cat IgE RAST class (S)Deprecated Cat IgE Ab RAST class in SerumDeprecated Cat IgE RAST QlCat Ab.IgE.RAST classALLERGYCat allergy testACnc

Frequently asked questions

Code details

Code15608-3
SystemLOINC
Display nameCat IgE RAST class (S)
DescriptionCat Ab.IgE.RAST class
Short nameDeprecated Cat IgE RAST Ql
ComponentCat Ab.IgE.RAST class
PropertyACnc
TimingPt
System (specimen)Ser
ScaleOrd
ClassALLERGY
StatusDEPRECATED
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.36

Consumer names

Cat allergy test

Part names

Cat Ab.IgE.RAST classACncPtSerOrdArbitrary 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.

LOINC Code 15608-3 | HealthAssure