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License & Identifications

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. James Castles:

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Specialties & Research

  • He has special expertise in 4 areas:
  • Hip Osteoarthritis
  • Knee Osteoarthritis
  • Osteoarthritis (Hand and Wrist)
  • Rheumatoid Arthritis

Education & Awards

Dr. Castles graduated from University of Chicago.


> > > > Dr. James Castles, MD

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Additional Information
Dr. James Joseph Castles MD is a male Rheumatologist, has 47 years of experience and practices in Rheumatology.
Where does Dr. James J. Castles practice?
Dr. James Castles has 2 office locations.
Dr. James Castles practices Rheumatology near Davis, CA.
Additional practice locations include: Sacramento, CA.
See Davis Rheumatologists.