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Test Code 279 Folic Acid (Folate)

Important Note

Human Anti-Mouse Antibodies (HAMA) may be present in samples from patients who have received immunotherapy utilizing monoclonal antibodies. Additionally, other heterophile antibodies such as human anti-goat antibodies may be present in patient samples. Manufacturers formulate assays to minimize the effects of these antibodies; however careful evaluation of patient results must be done when patients are known to have such antibodies.

Additional Codes


PowerChart: Folic Acid Level

MA Cerner: Folic Acid

Specimen Requirement

0.5 mL serum or plasma is required.

Additional Specimen Collection Information

Collect blood in a lithium heparin, green-top or red-top tube from a fasting patient. (12 hour fast is recommended.) PST and SST (gel tubes) are acceptable. Serum or plasma should be separated from contact with the cells within 2 hours of collection. Specimens not centrifuged within 4 hours of collection may be rejected. If specimen cannot be assayed immediately after collection they must be stored refrigerated. If specimens are stored longer than 8 hours they must be stored frozen at -20 C or colder for up to 6 months. Hemolyzed specimens are not acceptable.

Useful For

Investigation of suspected folate deficiency


Testing is performed Monday through Sunday.

Routine: Typically completed within 4 hours after the specimen arrives at the testing site.

STAT: Typically completed within 1 hour after the specimen arrives at the testing site.

CPT Code Information

82746: Chemistry: Folic Acid, serum

LOINC Code Information

2284-8 Folate [Mass/Volume] In Serum Or Plasma

Test Method

Competitive Binding Receptor Assay; Beckman

Reference Values

≥ 5.9 ng/mL