VITAMIN B12 (B12)
: Competitive Binding Immunoenzymatic Assay
: 0 to 150 yrs: 213-816 pg/mL
: Red Top Tube (no gel) - 5mL
: 1 red microtainer
: 3 mL serum
: 0.7 mL serum
: Room Temperature or Refrigerated.
: Unseparated serum: Room temperature or refrigerated (2 - 8 C) up to 24 hours;Separated Serum: Room temperature up to 3 days; Refrigerated (2-8 C): up to 7 days
Reasons for Rejection
: Improper collection; QNS
: Effective 1/20/2014, the acceptable tube type for Vitamin B12 Testing is Red Top tube.
This is due to an artifact identified in the green/mint top tubes that caused occasional spuriously high results.
Search Options for the Test Directory:
1. Enter the test name in the Keyword search field.
Hint: You can also enter any part of the test name to expand the search.
(Example: you can type "west" or "sed" or "rate" to find Westergren Sedimentation Rate)
2. Enter the Vanderbilt Test Code, if known.
3. Choose one of the letter boxes to display a list of all test names and keywords starting with that letter.
If you are unable to find a test in our directory, please contact VPLS at
1-800-551-5227 or e-mail firstname.lastname@example.org.