Collect	Light Blue (3.2% Sodium Citrate) - Platelet Poor Plasma *Double Centrifuged*
	Transport	CRITICAL Frozen
	Minimum Volume	1 mL Platelet Poor Plasma
	Remarks	Preferred Collection Instructions for Reflex Testing: ADAMTS13 Evaluation: 3 aliquots (0.5 ml each) ADAMTS13 Activity or Inhibitor or Antibody: 0.5 ml for each test ordered
	Notes	ADAMTS13 Evaluation is a reflexive testing algorithm. ADAMTS13 Activity is always performed. If activity is = 30%, the inhibitor assay is performed. If the inhibitor is = 0.7 Inhibitor Units, testing for ADAMTS13 Antibody is performed. Charges reflect assays performed.

85397; 85335, if the inhibitor is performed; 83520, if the antibody is performed *The CPT codes provided are based on the AMA guidelines and for informational purposes