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Test Code IGE Immunoglobulin E (IgE), Serum

Reporting Name

Immunoglobulin E (IgE), S

Useful For

Evaluating patients with suspected diseases associated with elevations in total immunoglobulin E (IgE), including allergic disease, primary immunodeficiencies, infections, malignancies, or other inflammatory diseases 

 

Diagnostic evaluation of patients with suspected allergic bronchopulmonary aspergillosis

 

 Identifying candidates for omalizumab (anti-IgE) therapy

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Serum


Ordering Guidance


For a listing of allergens available for testing, see Allergens - Immunoglobulin E (IgE) Antibodies



Specimen Required


Collection Container/Tube:

Preferred: Serum gel

Acceptable: Red top

Submission Container/Tube: Plastic vial

Specimen Volume: 0.5 mL

Collection Instructions: Centrifuge and aliquot serum into a plastic vial.


Specimen Minimum Volume

For total IgE: 0.3 mL
For total IgE and more than 1 allergen: 0.05 mL x number of allergen-specific tests + 0.25 mL dead space

Specimen Stability Information

Specimen Type Temperature Time
Serum Refrigerated (preferred) 14 days
  Frozen  90 days

Reference Values

Results reported in kU/L

Age

Reference interval

0-5 months

≤13

6-11 months

≤34

1 and 2 years

≤97

3 years

≤199

4-6 years

≤307

7 and 8 years

≤403

9-12 years

≤696

13-15 years

≤629

16 and 17 years

≤537

18 years and older

≤214

Day(s) Performed

Monday through Friday

Test Classification

This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

82785

LOINC Code Information

Test ID Test Order Name Order LOINC Value
IGE Immunoglobulin E (IgE), S 19113-0

 

Result ID Test Result Name Result LOINC Value
IGE Immunoglobulin E (IgE), S 19113-0

Report Available

Same day/1 day to 3 days

Reject Due To

Gross hemolysis OK
Gross lipemia OK

Method Name

Fluorescence Enzyme Immunoassay (FEIA)