CHRONIC URTICARIA

Specimen Required
Patient preparation: After consulting with their physician, patients taking calcineurin inhibitors should stop their medication for 72 hours prior to draw. Patients taking prednisone should stop their medication for 2 weeks prior to draw.
Draw blood in a SST. Spin, separate and send 2.0 mL serum (1.0 mL minimum) room temperature.

Alternate Specimen
Serum: Red-top

Methodology
Cell Culture and Histamine analysis

Stability
Room Temperature: 7 days, Refrigerated: 7 days; Frozen: 14 days

Reference Range
<10

Performed
Monday, Wednesday, Friday

Turnaround Time5-7 days
Test CodeFCERR
CPT-4 Code (s)
86352
LOINC Codes
69040-4

Warde
Medical
Laboratory