90525:CU (CHRONIC URTICARIA ) INDEX

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90525:CU (CHRONIC URTICARIA ) INDEX
Methodology: ExVivo Challenge / Cell Culture and Histamine Analysis
Edit Date: 7/15/2010
Performed: Monday-Friday
Released: 48-72 hours after setup at PeaceHealth Laboratories’ reference lab.
CPT Code: 86352-90
Specimen Collection Details
Collection: NOTE: Patients taking clacineurin inhibitors should stop their medication 72 hours prior to draw.
One 7.5 mL serum separator tube (SST).
Handling: Allow to clot, centrifuge and separate serum from cells and pour into a plastic vial. Refrigerate.
Stability: 7 days ambient, 14 days refrigerated, or 1 year frozen.
Standard Volume: 2 mL serum.
Minimum Volume: 1 mL serum.
Transport: Refrigerated, or frozen on dry ice.
Rejection Criteria: Specimen other than serum.
This test may require insurance company prior authorization before ordering.
Please check the prior authorization list
.
Failure to gain preauthorization may result in denial of coverage.

Reference Range:
<10.0
Patients with a CU Index ≥ 10 have basophil reactive factors in their serum which supports an autoimmune basis

for disease.

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