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LABORATORY TEST DIRECTORY

Factor IX Activity with Reflex to Bethesda Quantitative, Factor IX

CPT Code(s): 85250; if reflexed, add 85335
Specimen Required: Patient Preparation:
Collect:Lt. blue (sodium citrate). Refer to Specimen Handling at reliancediagnosticslab.com for hemostasis/thrombosis specimen handling guidelines.
Specimen Preparation:Transfer two 3 mL aliquots of platelet-poor plasma to two RDL Standard Transport Tubes. (Min: 2 mL/each)
Storage/Transport Temperature:CRITICAL FROZEN. Separate specimens must be submitted when multiple tests are ordered.
Stability:Ambient: 4 hours; Refrigerated: Unacceptable; Frozen: 2 weeks
New York DOH Approval Status: This test is New York DOH approved.
Aliases:
  • Bethesda Quantitative Factor IX
  • Coagulation Factor IX Inhibitor, Plasma
  • Factor IX Inhibitor Concentration
  • Factor IX Inhibitor, Quantitative
  • Factor IX, Activity