Test Code B12 Vitamin B12 Assay, Plasma or Serum
Methodology
Chemiluminescence Immunoassay
Performing Laboratory
Munson Healthcare Laboratories
Specimen Requirements
Specimen must arrive within 48 hours of draw.
Submit only 1 of the following specimens:
Plasma
Container/Tube: Green-top (heparin) gel tube.
Microcontainer with heparin and plasma gel separator is also acceptable.
Specimen Volume: 0.5 mL of heparinized
plasma
Transport Temperature: Refrigerate
Collection Instructions: Forward promptly.
Note: 1. Indicate plasma.
2. Label specimen appropriately (plasma).
Serum
Container/Tube: Gold-top serum gel tube.
Microcontainer with serum gel separator is also acceptable.
Specimen Volume: 0.5 mL of serum
Transport Temperature: Refrigerate
Collection Instructions: Forward
promptly.
Note: 1. Indicate serum.
2. Label specimen appropriately (serum).
Reference Values
132-653 pg/mL
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
82607