Help Please log in to determine if you are eligible to purchase PT Programs. HERPES SIMPLEX, ANTIGEN DETECTION (DFA) - HC2 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 Herpes simplex virus antigen detection (DFA) 5 Three shipments per year Program Information Five 5‑well slide specimens Shipping Schedule Shipment A: March 8 Shipment B: July 12 Shipment C: October 25 Guest Log in/Register