Proficiency Testing/EQA / Microbiology / Bacteriology Help Please log in to determine if you are eligible to purchase PT Programs. URINE COLONY COUNT - MC3 Analytes/procedures in bold type are regulated for proficiency testing by the Centers for Medicare & Medicaid Services (CMS). Procedure Challenges per Shipment Number of Shipments Urine colony count/urine culture identification 2 Three shipments per year Program Information Two urine specimens with diluents Shipping Schedule Shipment A: March 27 Shipment B: August 7 Shipment C: December 4 Guest Log in/Register