Laboratory Services
Vitamin B12 and Folate
Print this pageUpdated Test Information:
| Test Description |
Vitamin B12 and Folate
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|---|---|---|
| Synonym(s) |
Folic Acid and Vitamin B12
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| Test ID |
B12FOL
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| General Information |
Aids in detection of vitamin B12 and folate deficiency in individuals with macrocytic or unexplained anemia, or unexplained neurologic disease.
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| Specimen Type |
Serum
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| Specimen Requirements |
SST
Aliquot Tube |
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| Alternate Specimen Type |
Red top
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| 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.Transfer separated serum or plasma to an aliquot tube
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| Minimum Sample Volume |
1 mL
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| Pediatric Min. Volume (if applicable) |
500 uL
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| Additional Processing Details |
Separate serum or plasma from cells within 45 minutes of collection. If a red-top tube is used, transfer separated serum or plasma to a plastic transport tube.
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| Stability |
2 hours at 15‑25 °C
48 hours at 2‑8 °C 56 days at ‑20 °C (± 5 °C). Stability of serum obtained with separating tubes: 24 hours at 2-8 °C |
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| Unacceptable Specimen Conditions |
Hemolyzed samples
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| Methodology |
Eelectrochemiluminescence Immunoassay “ECLIA”
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| Estimated TAT |
0-2 Days
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| Testing Schedule |
Monday - Saturday
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| Test Includes |
Vitamin B12, Folate
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| CPT Code(s) |
82607
82746 |
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| Reference Range |
B12: 232-1245 pg/mL
Folate: 4.78-24.2 ng/mL |
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| Performing Lab |
Incyte Diagnostics
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| LOINC Code(s) |
2132-9, 2284-8
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