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Physicians and Staff

James F. Ganem, MD

Dr. James F. Ganem was born in Louisville, Kentucky and raised in Phoenix, Arizona, attending Camelback High School and graduating from the University of Arizona in 1980. Medical training began at the University of Louisville, School of Medicine where he graduated in 1985. Training completed following Medical School: Internship, Carney Hospital, Boston, MA, Residency, Maricopa Medical Center, Phoenix, AZ, Cardiology Fellowship: Good Samaritan Medical Center, Phoenix, AZ, Veterans Administration Medical Center, Phoenix, AZ.

Dr. Ganem founded East Valley Cardiology in 1990.  He served as the Medical Director of the Cardiac Cath Lab at Banner Desert Medical Center from 2006-2013. He is board certified in Internal Medicine, Cardiology, Interventional Cardiology and Echocardiography.

In 2014, Dr. Ganem was selected as a "Top Doc" for cardiovascular disease by PHOENIX Magazine. 

Daniel Einhorn, DO

Dr. Daniel Einhorn was born in Philadelphia, Pennsylvania. He graduated from Temple University and did graduate work in Psychology at U.C.L.A. His medical training began at Philadelphia College of Osteopathic Medicine. He then completed an Internship and Residency at Chicago Osteopathic Hospital, where he also served as Chief Medical Resident. Cardiology Fellowship was completed at the Medical College of Pennsylvania. Following this, he had his own private Cardiology practice in Mesa, Arizona.

He is Board certified in Cardiology. He joined East Valley Cardiology in September 2011. He has served as Chairman of Internal Medicine, Chief of Cardiology and Director of Cardiac Catheterization Laboratories at various Arizona hospitals. He participates in research and development studies/trials for various pharmaceutical companies. He has received many teaching awards for his participation in Residency Training Programs.


Melissa J. Mattison, NP

Melissa Mattison is a Family Nurse Practitioner and joined East Valley Cardiology in 2014. She is originally from South Dakota and earned a dual Bachelor’s Degree in biology and business from Arizona State University in 2005.  She then received Associates in Nursing from Gateway Community College in 2008. Melissa practiced as a Registered Nurse in the Cardiovascular Intensive Care Unit at Banner Heart Hospital and brings with her a wealth of knowledge and experience in caring for patients with complex cardiovascular disease.  Melissa earned her Master of Science in Nursing from Grand Canyon University in 2013.  She then received a national certification from the American Association of Nurse Practitioners in family practice. Melissa and her husband, Jeff, have two beautiful boys, Jacob and Jase.


Julia A. France, NP

Julia France is an Adult Nurse Practitioner and joined East Valley Cardiology in February 2017.  She earned her Bachelor of Science in Nursing degree from Clemson University, South Carolina in 2000.  Post-graduation at Clemson University, Julie joined the US Army serving 5 years of active duty and 3 years Reserves. Julie practiced as a Registered Nurse in the military with specialty training in the critical care setting.  While attending graduate school, she continued working as a registered nurse in the Cardiothoracic Intensive Care Unit.  She earned her Master of Nursing from the University of Washington in 2007.  Julie received national certification through the American Nurses Credentialing Center in 2007.  Since 2008, Julie has provided cardiovascular care to patients as a Nurse Practitioner in the Phoenix area.

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