Proficiency Testing/EQA / 2024 Surveys / Endocrinology Help Please log in to determine if you are eligible to purchase PT Programs. 1,25 DIHYDROXY VITAMIN D - BMV1 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 1,25 dihydroxy vitamin D 3 Two shipments per year Program Information BMV1-4 - Three 5.0‑mL liquid serum specimens for each program Shipping Schedule Shipment A: April 2 Shipment B: August 12 Guest Log in/Register