REFERENCE LABORATORY CHANGE
Serotonin Release Assay
Order Code: BCSRA
Fee Code: 21614 (CPT 86022)
Reference Laboratory: Blood Center of Wisconsin
New Order Code: SRAU
New Fee Code: AB054 (CPT 82542)
New Reference Lab: Mayo SRAU
Effective July 20, 2022, the Serotonin Release Assay (Unfractionated Heparin) is sent to Mayo Clinic Laboratories.
Collection Instructions: Send blue top (citrate 3.2%) or plasma aliquot for Heparin Antibody Assay (HITAB) screening test. Collect Serotonin Release Assay specimen in a red top tube from a fasting patient (preferred, but not required); do not use SST tube. Allow specimen to sit at room temperature for a minimum of 1 hour in order to clot completely. Centrifuge, aliquot 1 mL serum into a plastic vial and freeze (preferred) or refrigerate.
Reference Range: Negative.