Help Please log in to determine if you are eligible to purchase PT Programs. PD-L1 - PDL1 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 PD-L1 10 Two shipments per year Program Information One 10‑core tissue microarray slide; additional slides provided for H&E and PD-L1 control Shipping Schedule Shipment A: May 26 Shipment B: November 9 Guest Log in/Register Customers Who Bought This Item Also Bought CAP/NSH HISTOQIP MISMATCH REPAIR IHC VIEW DETAILS > HQIP NON-SMALL CELL LUNG CARCINOMA IHC VIEW DETAILS >