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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. Leslie Klaff:

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Specialties & Research

Dr. Leslie Klaff, MD is board certified in Internal Medicine.

Education & Awards

Dr. Klaff graduated from University Of The Witwatersrand, Parktown.


Dr. Klaff has 3 hospital affiliations:

  • Valley Medical Center 
  • Swedish Medical Center - Cherry Hill 
  • Swedish Cherry Hill 


  • Spanish

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Additional Information
Dr. Leslie Joseph Klaff MD is a male Internist, has 41 years of experience and practices in Internal Medicine.
Where does Dr. Leslie J. Klaff practice?
Dr. Leslie Klaff has 1 office location.
Dr. Leslie Klaff practices Internal Medicine near Renton, WA.
See Renton Internists.