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. Marc Greenstadt:
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- Currently 3.5 of 4 stars
The overall average patient rating of Dr. Marc Greenstadt is Excellent.
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Specialties & Research
Dr. Marc Greenstadt, MD is board certified in Internal Medicine and Endocrinology and Metabolism.
- He has special expertise in 3 areas:
- Diabetes Mellitus
Education & Awards
Dr. Greenstadt graduated from University of California at Los Angeles. He has 2 awards.
Dr. Greenstadt has 3 hospital affiliations:
- Valley Presbyterian Hospital
- Northridge Hospital Medical Center, Roscoe Boulevard Campus
- Northridge Hospital Med Ctr Rosco
Accepted Insurance Plans
Dr. Greenstadt accepts these health insurances in at least one office:
- United Healthcare - 16 plans
- Blue Shield of California - 88 plans
- Anthem Blue Cross - 14 plans
- Humana - 11 plans
- Cigna - 5 plans
- Aetna - 3 plans