Posted Date
Effective Date
Update Type New Tests
CPT Code 84591
Order Code VITB3
Referral Laboratory Mayo Medical Laboratories



Vitamin B3 Niacin

Order Code:                  B3

New Order Code:          VITB3

Fee Code:                     20160

Reference Lab:              Mayo VITB3

Mayo Clinic Laboratories will begin offering Vitamin B and Metabolites, Plasma, effective April 25, 2022. This test is used for assisting in the diagnosis of suspected vitamin B3 deficiency or toxicity, or in determining response to therapy. This test will replace Mayo FNIAC (91379) referred to Cambridge Biomedical.