At Advanced Surgical Associates our patients’ comfort and well-being are our priority. We take pride in utilizing modern, minimally-invasive techniques that effectively resolve a variety of health concerns, including gastrointestinal disorders, obesity, and diseases of the breast, with minimal downtime. Our experienced staff of compassionate and educated professionals is here to support you from your initial consultation through your recovery.
Meet the surgeons
Dr. David Thoman
Specializes in minimally-invasive gastrointestinal and weight loss surgery.
Dr. Kimberly Grafton
Specializes in treatment of breast cancer and disease, and malignant melanoma.
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Dr. Mazen Hashisho
Specializes in Vascular/Endovascular and Thoracic Surgery.
Why choose us
There are many reasons why people choose Dr. Thoman for their bariatric procedure. He offers impressive credentials, innovative techniques, and a proven record of safety. He is a highly trusted and respected bariatric surgeon in California who has been able to help thousands of people like you live better lives.