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Test Name:
Vitamin B12 with Serum Folate
- SBMF No:
30040 - Performance Lab Name:
Automated Lab - Test Mnemonic:
B12/FOL - ABN:
Not required - CPT Code:
82607; 82746 - LOINC Code:
2132-9; 2284-8 - Test Includes:
Vitamin B12, Serum
Folate, Serum - Also Known As:
B12 with Serum Folate
Vitamin B12 with Serum Folate - Also See:
30041 – Vitamin B12
30037 – Folate, Serum
30039 – Vitamin B12 with RBC Folate - Spec Type:
Serum - Spec Container:
Gold top (SST) or red top (serum) tube - Pref Vol:
2.0 mL - Min Vol:
0.6 mL - Fasting:
Recommended - Patient Prep:
Fasting 12 hours preferred
Testing not recommended within 1 month of B12 injection or 8 hours of last biotin dose - Spec Collect:
Routine venipuncture - Spec Process:
Clot 30 minutes
Promptly centrifuge 15 minutes
Immediately transfer serum to light-protected (amber) plastic tube - Spec Store Transport:
Refrigerated and protected from light - Spec Stability:
Room temperature (20-30°C): Unacceptable
1 week refrigerated (2-8°C)
2 months frozen (-20°C) – Do not use frost-free units that undergo repeated freeze/thaw cycles - Spec Reject:
Hemolyzed sample - Spec Remarks:
Preferred sample is serum, protected from light and refrigerated (2-8°C) - Methodology:
Electrochemiluminescent Immunoassay (ECLIA) - Use:
See individual test listings - Clinical Significance:
See individual test listings - Reference Range:
Folate, Serum:
– Normal: Equal to or greater than 4.2 ng/mL
– Borderline Deficient: 2.1-4.1 ng/mL
– Deficient: Less than 2.1 ng/mL
Vitamin B12: 215-1095 pg/mL - Day Run:
Sun-Sat (daily) - Time Run:
As received - Time Reported:
4 hours - Test Type:
HEMATOLOGY
