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Test Code VB12 VITAMIN B12

Important Note

The results of this assay can be falsely elevated due to the consumption of Biotin. Patients should discontinue the use of vitamins or supplements that contain Biotin 12 hours before blood draw. See Resources for more information.

Additional Codes

LAB67

Performing Laboratory

Porter Hospital Laboratory

Specimen Requirements

Specimen Type: Blood
Container/Tube: Tiger top, serum gel
Specimen Volume: Full tube, submit 0.6 mL 
Specimen Minimum Volume: 0.3 mL 
Collection Instructions:
1. Send specimen in original tube.
2. If there is a delay in transport of >1 hour, centrifuge tube.
3. Sample must be spun with 2 hours of collection.
4. Centrifuged samples are stable for:

  • 3 days at 2 – 8°C

NOTE: Do not use samples that have been stored at room temperature for longer than 8 hours. 

Specimen Transport Temperature

Refrigerated

Test Schedule / Analytical Time / Test Priority / Turn around Time

Monday - Friday / Not Available STAT / One Day

Test Classification and CPT Coding

82607

Normal Reference Values

159-1000 pg/mL

Critical Values

None

Specimen Requirements Additional Information

Serum – Spin within 2 hours of collection.