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Cat Dander-Specific IgE, Qualitative (Deprecated Test Code)

Published: August 9, 2026Updated: August 17, 2026

A qualitative blood test that checks for IgE antibodies to cat dander, which may indicate an allergic sensitization to cats.

Quick summary

["A positive result suggests allergy sensitization to cat dander, but it must be interpreted with your symptoms and exposure history."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
15609-1
Short code
Deprecated Cat Dander IgE RAST Ql
Synonyms
Deprecated Cat Dander IgE RAST Ql
Category
liver
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
10
Ref high
40
Critical range
— – 500 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
84484
SNOMED
302774002
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What is this test?

This test looks for allergen-specific IgE antibodies directed against proteins found in cat dander. A qualitative result reports whether such antibodies were detected rather than providing a specific concentration.

Why might I need this test?

It may be used to evaluate possible cat allergy, especially when you have symptoms such as sneezing, runny nose, watery eyes, wheezing, or hives after exposure to cats.

How is the test performed?

A blood sample is analyzed in the laboratory to determine whether cat dander-specific IgE antibodies are present. The laboratory method may vary, and the result is reported qualitatively.

How do I prepare for the test?

No special preparation is usually required. Tell your clinician about recent cat exposure, allergy symptoms, medications, and any allergy testing you have had previously.

Reference range

Adult: 10-40 U/LN/A

Specimen: serum

No special preparation required. Avoid fatty meals before the test if possible.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

A positive result indicates that IgE antibodies to cat dander are present and may support allergic sensitization. It does not by itself confirm that cat exposure is causing your symptoms, and a negative result does not completely exclude cat allergy.

Short name

Cat Dander IgE

Frequently asked questions

Does a positive result mean I am allergic to cats?
It suggests that your immune system has sensitized to cat dander. Your clinician should interpret the result alongside your symptoms, examination, and exposure history.
Can I have cat allergy even if this test is negative?
Yes. Some people have allergy symptoms without a detectable result on a specific IgE test, so clinical evaluation remains important.
Why does the title say the test code is deprecated?
This means the laboratory test code may be archived or no longer routinely ordered. The test may have been replaced by a newer laboratory test or panel.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 17, 2026. · Read our editorial policy