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Proficiency Testing/EQA / 2026 Surveys / Anatomic Pathology /
Predictive Markers

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CD20, IHC TISSUE MICROARRAY - PM3
PM3
Analytes/procedures in bold type are regulated for proficiency testing by the Centers for Medicare & Medicaid Services (CMS).

Analyte Challenges per Shipment Number of Shipments
CD20 10 Two shipments per year

For ER/PgR testing, see the PM2 program.


Program Information

  • One 10‑core tissue microarray slide per predictive marker

Shipping Scheudle

  • Shipment A: March 16
  • Shipment B: September 8




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