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COAGULATION-LIMITED - CGL
CGL
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
Activated partial thromboplastin time 5 See Samples tab below.
Fibrinogen 5
International normalized ratio (INR)* 5
Prothrombin time 5
D‑dimer 2
Fibrin(ogen) degradation products, plasma 1
Fibrin(ogen) degradation products, serum 1

*Participants reporting INR results will receive a special evaluation to assess the INR calculation.


Program Information

  • Five 1.0‑mL lyophilized plasma specimens; three shipments per year;
  • Two 1.0‑mL plasma specimens; one 1.0‑mL serum specimen; two shipments per year

Shipping Schedule

  • Shipment A: January 27
  • Shipment B: May 11
  • Shipment C: August 24






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