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Test Code VIT B12 BC Vitamin B12 Binding Capacity

Clinical System Name

Vitamin B12 Binding Capacity


B12, B12B


Sample Requirements

Specimen: Whole Blood

Container(s): Gold SST or Red

Preferred Vol: 2.0 mL

Minimum Vol: 1.0 mL


Note: 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.

Processing Instructions

Reject due to: Plasma.

Spin: Y

Aliquot: Y

Temp: 2 - 4 C

Storage Location: CPA refrigerator, Send Outs rack.


Off-site collection: Transfer 1.0 mL serum to a plastic aliquot tube (Min: 0.1 mL). Transport refrigerated to Seattle Children's Main Lab.


Specimen Type Temperature Time
Serum Room temp 6 h
  Refrigerated 1 w
  Frozen 1 m



STAT Performed TAT
N M and Th 1 - 5 d


Performing Laboratory

ARUP Laboratories

500 Chipeta Way

Salt Lake City, UT 84108-1221


Phone Number: (800) 522-2787


Department: Send Outs

Phone Number: (206) 987-2563


Method: Quantitative Radioimmunoassay

Analytical Volume: 0.1 mL Serum


Reference Ranges

800-2600 pg/mL

CPT Codes


Send Out Instructions

Reference Test Name Vitamin B12 Binding Capacity
Reference Test Code 0070260
Instructions Send out Monday - Friday with the ARUP courier.