Test Name: Folate
Health Link Test Code: FOL
LIS Test Code: FOL
CPT Code(s): 82746
Methodology: Chemiluminescent Immunoassay
Days Performed: Daily, 24 hours.
In-Lab Turnaround Time: 4 hours.
Collection Container: Red cap with yellow ring (SST)
Also Acceptable: Green cap with yellow ring (PST), Green top, Red top
Collection Volume: 1 mL
Pediatric Collection Volume: 0.5 mL
7 days removed from cells, clot or gel
8 hours on gel
Sample Analyzed: Serum or plasma
Testing Volume: 0.5 mL
Pediatric Testing Volume: 0.2 mL
Centrifuge. Redraw specimen if hemolysis is present. Transfer cell-free sample to plastic vial. Refrigerate.
Transport specimen to the laboratory. Transport with coolant pack if coming from clinic location.
Hemolyzed specimens are not acceptable.
18 years and up: ≥7.0 ng/mL
Interpretation Type: Expected Results
Patients receiving therapy with certain pharmaceuticals, e.g. methotrexate, aminopterin, or leucovorin, are contraindicated because of the cross-reactivity of folate binding protein with these compounds.
Results may be affected if patient has developed heterophilic antibodies due to exposure to animal blood products.