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).
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Specialties & Research
Dr. Sarah Janssen, M.P.H., MD, PHD is board certified in Occupational Medicine.
Education & Awards
Dr. Janssen graduated from University of Illinois at Chicago.
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- Where does Dr. Sarah J. Janssen practice?
Dr. Sarah Janssen practices Occupational Medicine near San Francisco, CA.
See San Francisco Preventive Medicine Specialists.