Platelet function test

Alphabetical Test listing

Platelet function test-6950

Platelet function test
Bleeding time
Platelet aggregation
Platelet closure time
Sodium citrate (Na cit) whole blood and
EDTA whole blood
Na Citrate (Na cit) whole blood - 9 mL
EDTA whole blood - 5 mL
  • Draw with a 21G needle
  • It is best if the specimen is collected at a testing facility (Central, Mercy or United), but if not, sample must be placed in a STAT bag and STAT couriered to the closest testing facility.

Na Citrate Tube Filling Guidelines

  • Immediately following collection, mix sample thoroughly by gently inverting 8 - 10 times to prevent clotting
  • DO NOT SPIN; Submit entire tube(s), unspun
  • Sample must arrive at the testing facility within 3 hours of collection.




Lt blue Sodium citrate (NaCit) tubes 


Lavender (EDTA), 4mL


Ambient - 3 hours

Send by STAT courier

Hospital Draw - hand deliver to Lab; do not send thru Pneumatic Tube System (PTS).

  • Improper labeling (unlabeled or mislabeled)
  • Improper anticoagulant
  • Improperly filled tube
  • Hemolysis
  • Clotted specimen
  • Delay in transport
  • Improper storage/transport temperature
AHL - Coagulation: W
Central Laboratory, Mercy and United
24 hours

COL/EPI: 94 - 193 seconds

COLI/EPI Results below the normal reference range have no known clinical significance.

COL/ADP: 71 - 118 seconds (reflex test)

85576 - COL/EPI

Additional CPT codes (if appropriate):
85576 - COL/ADP