Platelet Function Screen (PFA, PFA-100)

Tube Type (x2)

Test ID		LAB318
EPIC Order		PLATELET FUNCTION TEST
CPT Code(s)		85576
Group/Individual Test		Group
Laboratory		Core Laboratory
Tube Station		30 Routine: 888 STAT
Specimen	Routine:	2.7 mL blood/Lt Blue Sodium Citrate tube x 2; See Comments
Stability	Unspun:	Whole blood
	Room Temperature:	3 hrs
	Refrigerator:	NO
	Frozen:	NO
Availability	Routine:	24 hours/day, 7 days/week
	STAT:	YES
Turnaround Time		STAT 1 hr, Routine 2 hrs
Reference Range	COL/EPI	84-178 seconds
	COL/ADP	60-130 seconds
Comments	Cannot be added on to existing Coag test in lab - requires individual tube. Recommend 2 tubes due to volume required for testing. Do NOT refrigerate Do not centrifuge. Draw tube must be allowed to fill completely. Short draws will be rejected.

Reviewed by J. Carr on November 20, 2025

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514