Test Directory

Test Code
RDCED
Test Name
Red Cedar (T57) IgE**
CPT Codes
86003
Expected Turnaround Time
1 - 3 days
Clinical Utility

This test quantifies an individual's IgE response to red cedar. Allergen-specific serum IgE testing is considered comparable to skin testing and may be preferred in some clinical situations. However, a positive test result only indicates that a patient is sensitized to the allergen of concern. Many IgE-sensitized individuals do not develop any symptoms when exposed to the allergen. A diagnosis of allergy should only be made by a trained medical provider after conducting a thorough clinical evaluation.

Specimen and Container Info

Specimen Type: Serum

Preferred Collection Container: Gold Top, Serum Separator

Alternate Collection Container: Red Top, Plain

Desired Specimen Volume: 0.3 mL

Collection Instructions
  1. Collect a gold top, serum separator tube via venipuncture.
Processing and Submission Instructions
  1. Separate serum from cells.
  2. Transfer 0.3 mL of serum to a clear aliquot tube (screw cap).
Transport Instructions

Transport to the laboratory refrigerated.

Stability Requirements

Room Temperature

14 days

Refrigerated

14 days

Frozen

30 days

Methodology
Immunoassay
Reference Intervals

See patient report.

Alternate Names
  • Eastern Red Cedar
  • Juniperus virginiana
  • Red Cedar Juniper
Reference Lab
Quest Diagnostics Nichols Institute
Testing Schedule
Routine, Monday - Saturday