Proficiency Testing/EQA / 2024 Surveys / General Chemistry and Therapeutic Drug Monitoring / General Chemistry and Therapeutic Drug Monitoring Help Please log in to determine if you are eligible to purchase PT Programs. KETONES - KET 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 Beta‑hydroxybutyrate 2 Two shipments per year Total ketones 2 Program Information Two 2.0‑mL serum specimens For semi-quantitative methods using the nitroprusside reaction for total ketones testing Shipping Schedule Shipment A: April 29 Shipment B: November 4 Guest Log in/Register