Help Please log in to determine if you are eligible to purchase PT Programs. DRUG-SPECIFIC PLATELET AGGREGATION - PIA Analytes/procedures in bold type are regulated for proficiency testing by the Centers for Medicare & Medicaid Services (CMS). Procedure Challenges per Shipment Number of Shipments Aspirin assay 3 Two shipments per year PRU test 3 Program Information Three lyophilized specimens with diluents For use with the Accumetrics VerifyNow® System Kit includes sufficient material to perform one assay; multiple assay reporting requires the purchase of PIAX Shipping Schedule Shipment A: April 12 Shipment B: October 18 Guest Log in/Register