Help Please log in to determine if you are eligible to purchase PT Programs. P16 IHC TISSUE MICROARRAY - P16 Analytes/procedures in bold type are regulated for proficiency testing by the Centers for Medicare & Medicaid Services (CMS). Analyte Challenges per Shipment Number of Shipments p16 10 Two shipments per year Program Information One 10‑core tissue microarray slide Shipping Schedule Shipment A: April 14 Shipment B: November 16 Guest Log in/Register Customers Who Bought This Item Also Bought PD-L1 VIEW DETAILS >