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Vitamin B12 Assay, Plasma or Serum
Test Code1306
CPT Codes
82607
Preferred Specimen
Submit only 1 of the following specimens:
Plasma
Container/Tube: Green-top (heparin) tube(s) or Purple-top (EDTA) tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of plasma
Collection Instructions: Draw blood before transfusions or B12 therapy are started. Avoid hemolysis.
Note: 1. Indicate plasma. 2. Label specimen appropriately (plasma).
Serum
Container/Tube: Serum gel tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of serum
Collection Instructions: Draw blood before transfusions or B12 therapy are started. Avoid hemolysis.
Note: 1. Indicate serum. 2. Label specimen appropriately (serum).
Plasma
Container/Tube: Green-top (heparin) tube(s) or Purple-top (EDTA) tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of plasma
Collection Instructions: Draw blood before transfusions or B12 therapy are started. Avoid hemolysis.
Note: 1. Indicate plasma. 2. Label specimen appropriately (plasma).
Serum
Container/Tube: Serum gel tube(s)
Specimen Volume: 3 mL (minimum volume: 0.5 mL) of serum
Collection Instructions: Draw blood before transfusions or B12 therapy are started. Avoid hemolysis.
Note: 1. Indicate serum. 2. Label specimen appropriately (serum).
Instructions
Specimens are stable at room temperature for up to 24 hours. Samples may be stored refrigerated at 2-8°C for up to 48 hours. If testing is delayed beyond 48 hours, samples should be frozen at -20°C or colder. Avoid repeated freezing and thawing.
Transport Temperature
Refrigerate
Methodology
Immunochemiluminescent Assay
Setup Schedule
Monday through Friday
Reference Range
193-986 pg/mL
Performed By
CoxHealth
