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. Leif Ellisen:
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The overall average patient rating of Dr. Leif Ellisen is Excellent.
Specialties & Research
- He has special expertise in 3 areas:
- Breast Cancer
- Squamous Cell Carcinoma
Education & Awards
Dr. Ellisen graduated from Stanford University.
Dr. Ellisen has 5 hospital affiliations:
- Massachusetts General Hospital
- Brigham and Women's Hospital
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- Additional Information
- Dr. Leif William Ellisen MD and PHD is a male Oncologist , has 19 years of experience and practices in Medical Oncology.
- Where does Dr. Leif W. Ellisen practice?
- Dr. Leif Ellisen has 1 office location.
Dr. Leif Ellisen practices Medical Oncology near Boston, MA.
See Boston Oncologists.