B12 - Overview: Vitamin B12 Assay, Serum

Test Catalog

Test Name

Test ID: B12    
Vitamin B12 Assay, Serum

Useful For Suggests clinical disorders or settings where the test may be helpful

Investigation of macrocytic anemia


Workup of deficiencies seen in megaloblastic anemias

Testing Algorithm Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

See Vitamin B12 Deficiency Evaluation in Special Instructions.

Special Instructions and Forms Library of PDFs including pertinent information and consent forms, specimen collection and preparation information, test algorithms, and other information pertinent to test

Method Name A short description of the method used to perform the test

Immunoenzymatic Assay

NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.


Reporting Name A shorter/abbreviated version of the Published Name for a test; an abbreviated test name

Vitamin B12 Assay, S

Aliases Lists additional common names for a test, as an aid in searching

B(12) Assay
B(12) Assay, B12 + Folate
B12 Assay
B12, Serum
Cobalamin Cyanocobalamin
Cobalamin Deficiency
Vit B12, S MMLNE only
Vitamin B-12 Assay, Serum
Vitamin B12 and Folate, Serum
Vitamin B12, Serum
B(12) Assay ORDER FB12
B(12) Assay, B12 + Folate ORDER FB12
B12 Assay ORDER B12
Cobalamin ORDER B12
Cyanocobalamin ORDER B12
Vitamin B12 and Folate, Serum ORDER FB12