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Test Code
CUPAN
Test Name
Chronic Urticaria Index Panel
CPT Codes
84443, 86343, 86376, 86800
Included Tests
  • Anti-Thyroid Peroxidase IgG
  • Anti-Thyroglobulin IgG
  • TSH (Thyrotropin)
  • CU Index
Expected Turnaround Time
2 - 9 days
Clinical Utility

The CU Index test is the second generation Functional Anti-FceR test. Patients with a CU Index greater than or equal to 10 have basophil reactive factors in their serum which supports and autoimmune basis for disease.
Specimen and Container Info

Specimen Type: Serum

Collection Container: Gold Top, Serum Separator

Alternate Collection Container: Red Top, Plain

Desired Specimen Volume: 3 mL
Collection Instructions
  1. Collect a gold top, serum separator tube via venipuncture.
Processing and Submission Instructions
  1. Separate serum from cells within 2 hours of collection.
  2. Transfer 3 mL of serum to a clear aliquot tube (screw cap).
Patient Preparation
Patients taking calcineurin inhibitors should stop medication 72 hours prior to draw. Patients taking prednisone should be off their medication for 2 weeks prior to draw.
Transport Instructions

Transport to the laboratory refrigerated. 
Stability Requirements

Room Temperature

5 days

Refrigerated

7 days

Frozen

7 days
Methodology
Immunoassay; Ex Vivo Challenge; Cell Culture and Histamine Analysis
Reference Intervals

See patient report.
Alternate Names
  • Chronic Urticaria
  • CU Index Panel
  • FCUIP
Reference Lab
Mayo Clinic Laboratories
Testing Schedule
Routine Monday, Wednesday, and Friday
The American Medical Association (AMA) Current Procedural Terminology (CPT) codes published by HNL Lab Medicine are guidelines and are intended for informational purposes only. CPT coding is the exclusive responsibility of the billing entity. View the Terms.
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