Test Code B12 Vitamin B12, Serum
Performing Laboratory
MaineGeneral Medical Center
Reference Values
211-911 pg/mL
Day(s) Test Performed
Monday, Wednesday, Friday
Specimen Requirements
Draw blood in a gold-top (serum separator) gel tube. Label the specimen with the patient’s name (first and last), date of birth, date and time of draw and the phlebotomist’s initials. Spin down and send 1 mL of serum refrigerated. For pediatric specimen, draw blood in 2 red-top MICROTAINER(S)®.
Hemolyzed specimens are not acceptable.
Do not use samples that have been stored at room temperature for longer than eight (8) hours.
Specimen stability:
8 hours at room temperature when spun
48 hours at 2-8°C
Indefinitely when stored at ≤ -20°C
Minimum volume: 1 mL
Test Classification and CPT Coding
82607
Methodology
Chemiluminescent Immunoassay