ARUP's Laboratory Test Directory

Vitamin B12 & Folate : 0070160

Mnemonic: B12/FOL

Ordering Recommendation: Aids in detection of vitamin B12 and folate deficiency in individuals with macrocytic or unexplained anemia, or unexplained neurologic disease.
Methodology: Quantitative Chemiluminescent Immunoassay
Performed: Sun-Sat
Reported: Within 24 hours
Specimen Required: Collect: Serum separator tube.

Specimen Preparation: Protect from light during collection, storage, and shipment. Allow serum to clot completely at room temperature before centrifuging. Transfer 2 mL serum to an ARUP Amber Transport Tube. (Min: 0.5 mL)

Storage/Transport Temperature: Frozen.

Stability (collection to initiation of testing): After separation from cells: Ambient: 8 hours; Refrigerated: 48 hours; Frozen: 3 months

Reference Interval:
 
Test Number Components Reference Interval
0070150Vitamin B12 210-911 pg/mL
0070070Folate, Serum 0-3.3 ng/mL: Deficient
3.4-5.3 ng/mL: Indeterminate
5.4-40.0 ng/mL: Normal               

CPT Code(s): 82607; 82746
Cross References: Folate & Vitamin B12 (Vitamin B12 & Folate)