Sign in →

Test Code VITB12 VITAMIN B12

Important Note

24 hours before this blood test: Do not take any supplements containing biotin or Vitamin B7 which are commonly found in hair, skin, and nail supplements, and multi-vitamins.

Sufficient Biotin concentrations in serum can lead to falsely increased results.

Methodology

Competitive Chemiluminescent Immunoassay

Useful in the investigation of macrocytic anemias and peripheral neuropathies.

Specimen Requirements

Submit only 1 of the following specimens:

Preferred:

Serum

Serum Gel Tube

Container/Tube: Serum gel tube(s)
Specimen Volume: 2 mL (minimum volume: 1 mL) of serum-Hemolyzed specimen is not acceptable.

Collection Instructions: Spin down within 4 hours of draw.

Note: Label specimen appropriately (serum).

 

Alternate:

Serum

Plain, Red-Top Tube

Container/Tube: Plain, red-top tube(s)
Specimen Volume: 2 mL (minimum volume: 1 mL) of serum-Hemolyzed specimen is not acceptable.

Collection Instructions: Spin down within 4 hours of draw.

Note: Label specimen appropriately (serum).

 

Alternate:

Plasma

Container/Tube: Green-top (lithium heparin) tube(s)

Specimen Volume: 2 mL (minimum volume: 1 mL) of plasma-Hemolyzed specimen is not acceptable.

Collection Instructions: Spin down within 4 hours of draw.

Note: Label specimen appropriately (plasma).

Day(s) Test Set Up

Tuesday, Thursday, Saturday

Reference Values

239-931 pg/mL

Performing Laboratory

Logan Health Medical Center-Chemistry

Test Classification and CPT Coding

82607

Specimen Transport Temperature

Refrigerate