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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. David Horwitz:

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Specialties & Research

Dr. David Horwitz, MD is board certified in Internal Medicine and Rheumatology.

  • He has special expertise in 6 areas:
  • Hip Osteoarthritis
  • Knee Osteoarthritis
  • Osteoarthritis (Hand and Wrist)
  • Rheumatic Diseases
  • Rheumatoid Arthritis
  • Rheumatology

Education & Awards

Dr. Horwitz graduated from University of Chicago.


Dr. Horwitz has 3 hospital affiliations:

  • USC University Hospital 
  • Los Angeles County + University of Southern California Medical Center 
  • USCNorris Cancer Hospital 

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Additional Information
Dr. David Allen Horwitz MD is a male Internist, has 50 years of experience and practices in Internal Medicine and Rheumatology.
Where does Dr. David A. Horwitz practice?
Dr. David Horwitz has 1 office location.
Dr. David Horwitz practices Internal Medicine and Rheumatology near Santa Monica, CA.
See Santa Monica Internists and Santa Monica Rheumatologists.