FB12 - Overview: Vitamin B12 and Folate, Serum

Test Catalog

Test Name

Test ID: FB12    
Vitamin B12 and Folate, 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


Investigation of suspected folate deficiency

Profile Information A profile is a group of laboratory tests that are ordered and performed together under a single Mayo Test ID. Profile information lists the test performed, inclusive of the test fee, when a profile is ordered and includes reporting names and individual availability.

Test IDReporting NameAvailable SeparatelyAlways Performed
B12Vitamin B12 Assay, SYesYes
FOLFolate, SYesYes

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

B12: Immunoenzymatic Assay

FOL: Competitive Binding Receptor 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 or abbreviated version of the Published Name for a test; an abbreviated test name

Vitamin B12 and Folate, S

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

B(12) Assay, B12 + Folate - ORDER 9156
B12 Assay
B12 Deficiency
B12/Folate, Serum
Cobalamin Deficiency
Folate and Vitamin B12 - ORDER 9156
Folate, Serum
Folate/Vitamin B12, Serum
Folic Acid - ORDER 9198
Pteroylglutamic Acid
Vitamin B12