At LabCorp, Vitamin B12 is drawn in a Gel-barrier tube (preferred) or red-top tube, order code 001503.

LabCorp collection requirements

Vitamin B12 tube and order code at LabCorp

Primary tube

Gel-barrier tube (preferred) or red-top tube

Order code

001503

Minimum volume

0.7 mL (Note: This volume does not allow for repeat testing.)