Platelet Count (PLTC): CPT 85049

CPT Code: 



Whole blood


Tube fill capacity

Minimum Volume: 

0.5 mL 


Lavender-top (EDTA) tube


Automated cell counter


Invert tube immediately 8 to 10 times once tube is filled at time of collection

Reference Range:          

Males  150-450 103/µL 
Females  150-450 103/µL 


Storage: Maintain specimen at room temperature.



Temperatures  Period 
Room Temperature  1 Day 
Refrigerated  3 Days 
Frozen  Unstable 
Freeze/thaw cycles Unstable


Use:    Platelets play a vital role in the blood clotting process. The platelets stop bleeding by sticking together and forming “plugs.” A variety of disease conditions can cause low numbers of platelets; these individuals tend to bleed more easily and excessively. Extremely low or high platelet counts may indicate blood disorders which require additional testing. 

Causes for Rejection:


Hemolysis; clotted specimen; tube not filled with minimum volume; improper labeling; transfer tubes with whole blood; specimen diluted or contaminated with IV fluid; specimen received with plasma removed; specimen collected in any anticoagulant other than EDTA)