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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Specialties & Research
- He has special expertise in 3 areas:
- Hay Fever (Seasonal Allergic Rhinitis)
- Nasal Allergy (Rhinitis)
Education & Awards
Dr. Grebenau graduated from New York University.
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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.