Proficiency Testing/EQA / 2024 Surveys / Endocrinology Help Please log in to determine if you are eligible to purchase PT Programs. BONE AND GROWTH - BGS 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 IGF‑1 (somatomedin C) 3 Two shipments per year Osteocalcin 3 Program Information Three 1.0‑mL liquid serum specimens Conventional and International System of Units (SI) reporting offered Shipping Schedule Shipment A: April 22 Shipment B: September 16 Guest Log in/Register