St. Joseph Hospital of Orange
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Our Experts

A Team Approach

The specially trained bariatric specialists on staff at St. Joseph Hospital provide the latest technology and advanced procedures in the field. Our comprehensive, patient-centered care focuses on a multidisciplinary approach to successful long-term weight loss using the expertise of surgeons, the program coordinator, psychologist, registered dietitians, physical therapists, exercise physiologist, the meditation/spirituality specialist, acute-care surgical and post-op staff, and office personnel.

All of our surgeons have been recognized by the Surgical Review Corporation as Bariatric Surgery Center of Excellence® Surgeons.

Our Experts

Sami Hamamji, M.D.
Board Certified, General Surgery
Bariatric Care Center at St. Joseph Hospital Orange, CA
Jeffrey M. Johnsrud, M.D.
Board Certified, General Surgery
Medical Director Bariatric Care Center at St. Joseph Hospital, Orange, CA
Eric H. Pham, M.D.
Board Certified, General Surgery
Bariatric Care Center at St. Joseph Hospital Orange, CA
Heidi Daniel, R.N.
Manager, St. Joseph Hospital
Bariatric Surgery Program at St. Joseph Hospital Orange, CA
Geoffrey Phillips, M.D.
Psychiatrist
Bariatric Surgery Program at St. Joseph Hospital Orange, CA
Natalie Buntzen, M.S., R.D.
Dietitian
Bariatric Surgery Program at St. Joseph Hospital Orange, CA
Siham (Sue) Arevalo
Exercise Physiologist
Shirley Hartshorn
Guided Imagery
Bariatric Surgery Program at St. Joseph Hospital Orange, CA
Mary-Nell Jeffries, PT
Physical Therapist
Bariatric Surgery Program at St. Joseph Hospital Orange, CA