Methodology
Chemiluminescence Microparticle Immunoassay (CMIA)
Synonyms
B12; Cobalamin; Cyanocobalamin
Specimen Type
Serum or Plasma
Performing Lab
RCHSD Chemistry
Epic ID
LAB01465
Lab Test Days
As received
Standard TAT
1 Hour
Collection Information
Specimen Required
1 mL Blood
Container Type
Light Green (Lithium Heparin PST)
Collection Instructions
Serum collected in a (red top) tube or Serum Separator Tube (SST) are also acceptable.
Processing Information - Lab Use Only
Transport Temperature
Refrigerate-OK/Frozen-OK/Ambient-OK
Specimen Stability
Room Temp: 3 Days; Refrigerated: 7 Days; Frozen: 1 Month
Rejection Criteria
Heat-inactivated; Pooled; Hemolysis; Microbial contamination
Test Volume Required
0.5 mL Serum or Plasma
Minimum Test Volume
0.25 mL Serum or Plasma
Processing Instructions
Separate serum and deliver to Chemistry. Specimen should be free of bubbles. Remove bubbles with a pipette before analysis.
CPT Codes
82607
Revised
6/15/26
Initials
SA