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License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

Learn more about Dr. Mark Grebenau:

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Education & Awards

Dr. Grebenau graduated from New York University.


  • German

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Additional Information
Dr. Mark David Grebenau MD is a male Allergist & Immunologist, has 33 years of experience and practices in Allergy & Immunology.
Where does Dr. Mark D. Grebenau practice?
Dr. Mark Grebenau has 1 office location.
Dr. Mark Grebenau practices Allergy & Immunology near West Orange, NJ.
See West Orange Allergists.