Help Please log in to determine if you are eligible to purchase PT Programs. CHLAMYDIA/GC BY NAA - HC6 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 Nucleic acid amplification (NAA) 5 Three shipments per year Program Information Three swab specimens and two 1.0‑mL liquid simulated urine specimens Shipping Schedule Shipment A: February 1 Shipment B: May 17 Shipment C: September 20 Guest Log in/Register