Help Please log in to determine if you are eligible to purchase PT Programs. URINE CRYSTALS - URC 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 crystal identification 2 Two shipments per year Program Information Two 1.5‑mL urine specimens Shipping Information Shipment A: June 29 Shipment B: November 30 Guest Log in/Register Customers Who Bought This Item Also Bought Histologic Preparations: Common Problems and Their Solutions VIEW DETAILS > Color Atlas of the Urinary Sediment: An Illustrated Field Guide Based on Proficiency Testing VIEW DETAILS >