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HelpTest Code FOL Folate, Serum
Reporting Name
Folate, SUseful For
Investigation of suspected folate deficiency
Method Name
Competitive-Binding Receptor Assay
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
SerumSpecimen Required
Patient preparation:
1. Patient should be fasting for 8 hours.
2. Do not order on patients who have recently received methotrexate or other folic acid antagonists.
Collection Container/Tube:
Preferred: Serum gel
Acceptable: Red top
Submission Container/Tube: Plastic vial
Specimen Volume:0.6 mL
Collection Instructions:
1. Serum gel tubes should be centrifuged within 2 hours of collection.
2. Red-top tubes should be centrifuged, and the serum aliquoted into a plastic vial within 2 hours of collection.
Specimen Minimum Volume
0.5 mL
Reject Due To
| Gross hemolysis | Reject |
| Gross lipemia | OK |
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Serum | Refrigerated (preferred) | 7 days | |
| Frozen | 90 days |
Special Instructions
Reference Values
≥4.0 mcg/L
<4.0 mcg/L suggests folate deficiency
Day(s) Performed
Monday through Saturday
CPT Code Information
82746
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| FOL | Folate, S | 2284-8 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| FOL | Folate, S | 2284-8 |
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.Report Available
1 to 3 daysForms
If not ordering electronically, complete, print, and send a Benign Hematology Test Request Form (T755) with the specimen.