Help Please log in to determine if you are eligible to purchase PT Programs. LIGAND ASSAY-TESTOSTERONE, SHGB - DY Analytes/procedures in bold type are regulated for proficiency testing by the Centers for Medicare & Medicaid Services (CMS). Analyte Challenges/Shipment Number of Shipments Testosterone, bioavailable 3 Two shipments per year Testosterone, free 3 Sex hormone‑binding globulin (SHBG) 3 Samples Shipping Schedule Must order in conjunction with Survey Y or YY Conventional and International System of Units (SI) reporting offered Shipment A: April 25 Shipment B: September 19 Guest Log in/Register