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. Donald Widder, MD is board certified in Diagnostic Radiology.
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Education & Awards
Dr. Widder graduated from University of California at San Diego, La Jolla.More Education & Awards
Dr. Widder has 2 hospital affiliations:
- Sonoma Valley Hospital
- Contra Costa Regional Medical Center
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