Help Please log in to determine if you are eligible to purchase PT Programs. CHLAMYDIA/GC BY NAA, ADD'L MAT'L - HC6X 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; two 1.0-mL simulated urine specimens in duplicate Shipping Schedule Shipment A: February 3 Shipment B: May 18 Shipment C: September 21 Guest Log in/Register