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Laboratory Test Directory

Vitamin B12 Binding Capacity


Name Method Department Units
Vitamin B12 Binding Capacity Quantitative Radioimmunoassay
Send Out pg/mL

Specimen Requirements

Serum Spun

Container Type Container Size Specimen Volume

Red tube, (no anticoagulant), No Gel

3 mL 1 mL

Red Tube (no anticoagulant) with Gel

3 mL 1 mL

Gold tube, (SST) with Gel

3.5 mL 1 mL

Room temperature - 6 hour(s)
Refrigerated - 1 week(s)
Frozen - 1 month(s)

Specimen Preparation

  • Centrifuge within 2 hours, separate supernatant and freeze

Reasons for Rejection

  • Wrong collection tube
  • Plasma unacceptable


Patient should fast for 12-15 hours prior to collection. Vitamin B12 supplements should not be administered within 72 hours of drawing blood for this test.

CPT Code

  • 82608