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. J Shaffer:
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- Currently 4 of 4 stars
The overall average patient rating of Dr. J Shaffer is Excellent.
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Specialties & Research
Dr. J Shaffer, MD is board certified in Internal Medicine.
- He has special expertise in 3 areas:
- Flu (Human Influenza)
- Nutritional Support
- Sports Medicine
Education & Awards
Dr. Shaffer graduated from University of Utah, Salt Lake City.
Dr. Shaffer has 5 hospital affiliations:
- Mercy General Hospital
- Sutter General Hospital
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- Additional Information
- Dr. J Ronald Shaffer MD is a male Internist, has 48 years of experience and practices in Internal Medicine.
- Where does Dr. J R. Shaffer practice?
- Dr. J Shaffer has 2 office locations.
Dr. J Shaffer practices Internal Medicine near Sacramento, CA.
See Sacramento Internists.