Laboratory Services

Updated Test Information:

Test Description
Folate
Synonym(s)

Folic Acid

Test ID
FOL
Performing Lab

Incyte Diagnostics

General Information

Samples for folate determinations should be collected from fasting persons.

Container Type

SST

Specimen Type

Serum

Specimen Requirements

1mL

Alternate Specimen Type

Red Top

Specimen Collection / Processing Instructions

SST - Samples should not be taken from patients receiving therapy with high biotin doses (i.e.greater than 5 mg/day) until at least 8 hours following the last biotin administration. Centrifuge within 45 minutes of collection and transfer serum to an Amber Light Protected aliquot tube.

Minimum Sample Volume

0.50 mL

Pediatric Min. Volume (if applicable)

500 uL

Stability

2 hours at 20‑25 °C
48 hours at 2‑8 °C
28 days at ‑20 °C (± 5 °C). Freeze only once.

Unacceptable Specimen Conditions

Hemolyzed samples

Methodology

Electrochemiluminescence immunoassay ECLIA

Estimated TAT

0-2 days

Testing Schedule

Monday-Saturday

CPT Code(s)

82746

Reference Range

4.78-24.2 ng/mL

LOINC Code(s)

2284-8