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MX1B/MX2B COMBINATION, CLASS I & II - MXB
MXB
Analytes/procedures in bold type are regulated for proficiency testing by the Centers for Medicare & Medicaid Services (CMS).

Procedure Corresponding Survey Number of Shipments
Crossmatching, antibody screen, and antibody identification (Class I) MX1B Three shipments per year
Crossmatching, antibody screen, and antibody identification (Class II) MX2B

Program Information

  • Class I: three 0.25‑mL plasma specimens, two purified peripheral blood lymphocyte specimens) purified peripheral blood lymphocyte specimens
  • Class II: three 0.25‑mL plasma specimens, two purified peripheral blood lymphocyte specimens

Shipping Schedule

  • Shipment A: January 28
  • Shipment A: March 31
  • Shipment B: May 19
  • Shipment B: July 28
  • Shipment C: October 20
  • Shipment C: November 17






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