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Test Code B12P Vitamin B12

Additional Codes

EPIC:  LAB67

Methodology

Chemiluminescent Immunoassay


Used to detect vitamin B12 deficiencies due to low vitamin B12 intake such as malabsorption or abnormalities associated with altered vitamin B12 transport into the body, and to aid in diagnosis of megaloblastic anemia and certain neurological abnormalities.

Performing Laboratory

St. Joseph Hospital

Specimen Requirements

Preferred:  Plasma

Draw blood in a light green-top (PST - lithium heparin gel) tube(s). (Hemolyzed specimen is not acceptable.) Spin down, separate plasma from cells within 2 hours of collection, and send 1 mL of lithium heparin plasma refrigerated.

Note:  Label specimen as “plasma”. 

Acceptable:  Serum

Draw blood in a plain, red-top tube(s) or SST- serum gel tube(s). (Hemolyzed specimen is not acceptable.) Centrifuge, separate serum from cells within 2 hours of collection, and send 1 mL of serum refrigerated.

Note:  Label specimen as “serum”

Reference Values

232 - 1245 pg/mL

Day(s) Test Set Up

Monday through Saturday

Test Classification and CPT Coding

82607

Special Instructions