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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. Gregory Krastein:

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Specialties & Research

Dr. Gregory Krastein, MD is board certified in Nephrology.

Education & Awards

Dr. Krastein graduated from George Washington University. He has 2 awards.

Bridges to Excellence Recognition
Diabetes Care Recognition (2014 - 2016)
Level I
NCQA Diabetes Physician Recognition Program (2014 - 2017)


Dr. Krastein has 2 hospital affiliations:

  • Kaiser Permanente Woodland Hills Medical Center 
  • St. John's Regional Medical Center 


  • Russian

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Additional Information
Dr. Gregory Krastein MD is a male Nephrologist, has 23 years of experience and practices in Nephrology.
Where does Dr. Gregory Krastein practice?
Dr. Gregory Krastein has 1 office location.
Dr. Gregory Krastein practices Nephrology near Oxnard, CA.
See Oxnard Nephrologists.