About Me

Dr. Greenfield is a co-founder of California Heart Associates in Orange County, California. He is board certified in Internal Medicine, Cardiovascular Diseases, and Clinical Lipidology. He received his B.A. from City University of New York, Brooklyn College, and his MD from the State University of New York- Downstate Medical Center. After his Residency and Fellowship, he went on to accept an academic position at UC-Irvine Medical Center as full-time faculty before co-founding California Heart Associates in 1979.

After twenty-one years, he accepted a full-time faculty position in the Division of Cardiology and as Director of the Cardiology Clinics at the Oregon Health Sciences University in Portland where he stayed for three years before returning to California Heart Associates. He continues teaching and is a national and regional speaker for several pharmaceutical companies, and he can periodically be heard on KFI-AM. His research includes the fields of lipidology, acute coronary syndrome, and risk factor modification. He is currently on the Board of Directors of the Pacific Chapter of the National Lipid Association. Dr. Greenfield remains full-time in his busy practice of cardiovascular diagnosis, treatment, cholesterol management, and prevention.

Areas of Interest

  • Preventive Cardiology (also known as Heart Disease Prevention,Management and Control of Risk Factors)
  • Clinical Lipidology Expertise (also known as Lipid Management)
  • Cardiac Rehabilitation
  • Lipid Management
  • Blood Pressure Management
  • Heart Disease
  • Heart Attack
  • High Cholesterol
  • High Blood Pressure
  • Blocked Arteries
  • Cardiac Failure
  • Valve Disease
  • High Lipids and Triglycerides


Provider Specialty

Cardiology, Internal Medicine

Locations & Affiliations