Proficiency Testing/EQA / 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. WHOLE BLOOD CREATININE - WBCR Analytes/procedures in bold type are regulated for proficiency testing by the Centers for Medicare & Medicaid Services (CMS). Challenges per Shipment Number of Shipments Creatinine 5 Three shipments per year Program Information Five 4.0‑mL whole blood specimens For use with the Nova StatSensor/StatSensor Xpress Shipping Schedule Shipment A: March 20 Shipment B: July 24 Shipment C: November 20 Guest Log in/Register