Folate

Tube Type

Test ID		LAB69
EPIC Order		FOLATE LEVEL
CPT Code(s)		82746
Group/Individual Test		Individual
Laboratory		Core Laboratory
Tube Station		30
Specimen	Routine:	4 mL blood/gold SST tube/red plain tube also acceptable; See Comments
	Micro:	500µL blood/serum separator bullet/red top
Stability		Spun: Room temperature: <8 hours recommended Refrigerator: 48 hours Frozen: 30 days
Availability	Routine:	24 hrs/day
Turnaround Time		4 hrs
Reference Range	Normal:	>5.4 ng/mL
Comments	Hemolyzed Specimens Rejected. Heterophilic antibodies may cause interference.  Methotrexate and leucovorin interfere with folate measurement due to cross-reaction with folate-binding proteins.

Reviewed by J. Carr on December 31, 2025