Our Surgeons

John K. Shaver, MD, FACS

Dr. Shaver graduated with Honors from University of California, Davis with his Bachelor of Science in Physiology.  He earned his Doctor of Medicine from Vanderbilt University School of Medicine in 1988.  University of California San Francisco saw his completion of General Surgery Residency plus an additional two year Endocrine Surgery fellowship. 

He is board certified by the American Board of Surgery, a Fellow in the American College of Surgeons, and member of the American Medical Association.  His previous administrative responsibilities include Chief of Surgery and Director of Trauma at Mission Hospital.

Special interests of Dr. Shaver include Advanced Laparoscopic and Robotic procedures such as laparoscopic Nissen fundoplication for gastroesophageal reflux disease (GERD), laparoscopic hiatal and paraesophageal hernia repair, laparoscopic colorectal resection, and laparoscopic adrenalectomy.  He is on the forefront of minimally invasive operations treating endocrine surgical diseases of the thyroid, parathyroid, and adrenal glands. 

Aside from these operations, Dr. Shaver maintains a tireless schedule with the complete complement of General Surgery patients, including those with hernias, cancers and benign disorders of the breast, colon, skin, pancreas, liver, etc. 

Louise N. Bacon, MD, FACS

Dr. Bacon graduated from Spelman College in Georgia with a Bachelor of Science in Biology.  She earned her Doctor of Medicine from Meharry Medical College in 2010.  Her Post Doctoral training was completed at Morehouse School of Medicine in 2015 to complete her General Surgery Residency and the University of California Irvine Medical Center in 2016 for her Advanced GI and Minimally Invasive Surgical Fellowship. 

She is board certified by the American Board of Surgery, a Fellow in the American College of Surgeons, a member of the American Medical Association and American College of Surgeons.  She is also an active member in the local Southern California Chapter of the American Medical Association.  Her scholastic awards from Meharry Medical College include Clinical Science Department Honors and the Matthew Walker Surgical Award for top performing surgery student.  At Morehouse School of Medicine, she held positions of Administrative Chief Resident, Resident Ambassador to the Board of Trustees, and Surgery Representative for the Resident Association Committee.

Dr. Bacon has many surgical interests to include Advanced Laparoscopic General Surgery interventions and Robotic procedures such as colorectal resections, hiatal and paraesophageal hernias, and nissen fundoplications for treatment of GERD.   She is in process of implementing a Bariatric program at Mission Hospital for the Southern Californian community.  

Ahmad Abou Abbass, MD, FACS

Dr. Abbass graduated with his Bachelor of Science in Biology in 1998 from the University of Beirut, Lebanon.  He pursued his education in Lebanon and graduated with his Medical Doctorate in 2010.  He then traveled to the United States and completed an additional residency at Henry Ford Hospital in Detroit, Michigan during 2010-2015. He remained Senior Staff Surgeon at Henry Ford Health Systems from 2015-2018.

He is board certified by the American Board of Surgeons, the American Society of Transplant Surgeons for Liver and Kidney Transplantation, and a Fellow of the American College of Surgeons.  He maintains his certifications in Advance Trauma Life Support, Advanced Trauma Operative Management, and Advanced Cardiac Life Support.  He is currently expanding his practice in Southern California with complex liver/gallbladder/pancreatic surgeries.Dr. Abbass has been appointed as the Director of the Hepatobiliary Program at Mission Hospital.

Dr. Abbass current areas of expertise include many general surgery cases, such as hernias, gallbladders, diseases of the bowel, laparoscopic and robotic procedures, major abdominal procedures, complex liver, pancreas, and gallbladder cancers, and surgical/trauma critical care.  He is well received by his patients and peers with his energetic and responsive attitude towards surgical intervention.

Marla R. Anderson, MD, FACS

Dr. Anderson graduated with honors from the University of California Davis with a Bachelor of Science in Biochemistry in 1994.  She earned her Doctor of Medicine and participated in her General Surgery Residency at Northwestern University Medical School during 1995 through 2004.  From 2004 to 2018, she has worked at Kaiser/San Rafael, Unity Point Methodist Hospital, University of Illinois, and Illinois Breast Surgical Specialists.  In January 2019, Dr. Anderson joined our practice and is a welcome member of the Saddleback Surgery Division of South Orange County Surgical Medical Group.

She is board certified by the American Board of Surgery, a Fellow in the American College of Surgeons, and a member of the American Society of Breast Surgeons.  She has held positions on the breast cancer and leadership committee, the breast center steering committee, the breast interdisciplinary committee, the surgical safety committee, the commission on cancer committee and many others.   She is the current Medical Director of Surgical Breast Oncology for Mission Hospital.

Dr. Anderson’s surgical interest pertains to all aspects of breast disease and includes breast cancer treatment and prevention.  She has dedicated her practice of surgery to assist patients with breast disease and its implication on their lifestyles.   She is at the forefront of developing programs for high risk breast cancer in our community.  Her compassionate sensitivity in addressing the issues of a life changing disease is greatly appreciated by her patients.


Matthew Brady, MD, FACS

Dr. Matthew T. Brady, MD is a board certified, fellowship trained, general surgeon who specializes in Colon and Rectal Surgery. Dr. Brady is a diplomate of the American Board of Surgery, the American Board of Colon and Rectal Surgery, and a Fellow in the American College of Surgeons. He is an active member of both the American College of Surgeons and the American Society of Colon and Rectal Surgeons. He has published multiple book chapters and academic manuscripts in the field of colon and rectal surgery.
He has a specific interest in colon and rectal cancer, inflammatory bowel disease, diverticular disease, rectal prolapse, pelvic floor disorders, and benign anorectal disorders. He specializes in both laparoscopic and robotic surgery, as well as transanal endoscopic operations. He is passionate about providing the most advanced care possible to his patients.
Dr. Brady received his medical degree from Tufts University in Boston, MA. He went on to perform his general surgery residency training at Boston University in Boston, MA. There he was the recipient of both the Junior resident and Chief resident teaching awards. During his final year of residency, he served as the Administrative Chief Resident. He is a member of the Alpha Omega Alpha Honor Medical Society. Following his residency training he pursued a fellowship in Colon and Rectal Surgery at the University of California, Irvine Medical Center.
He enjoys spending time outside the hospital with his family.
Undergraduate: College of the Holy Cross, 2006
Medical School: Tufts University School of Medicine, 2010
Internship: Boston University, 2011
General Surgery Residency: Boston University, 2017
Colon and Rectal Surgery Fellowship: University of California Irvine, Irvine Medical Center 2018

Kenneth D. Kushner, MD, FACS

Dr. Kushner graduated Cum Laude with his Bachelor of Arts degree from University of California San Diego, then crossed the country for medical school at New York Medical College, from which he graduated in 1981 as a member of the medical honor society Alpha Omega Alpha.  General Surgery residency at Los Angeles County-University of Southern California Medical Center prepared him for joining the practice here in 1986. 

He is board certified by the American Board of Surgery and the American Board of Laser Surgery, fellow in the American College of Surgeons, and member of the American Medical Association and the Society of Graduate Surgeons of Los Angeles County.  He is a certified instructor for Advanced Trauma Life Support.

His colleagues and patients greatly appreciate Dr. Kushner's careful explanations, whether in his native English, in Spanish, or the multiple other languages in which he is fluent.  His methodic approach to complex patients and surgical conditions is a strong asset to the group.

Dr. Kushner is skilled in repairs of hernias, treatment of malignant or benign breast disease, laparoscopic gallbladder and colorectal disease operations, skin and soft tissue tumor excision, major abdominal operations and cancer surgery.  He is Co-Director of Trauma Services at Mission Hospital.

Dr. Kushner is skilled in all areas of General Surgery. His current focus of practice and service to is now Trauma intervention and Acute Care Surgery.


Notice to patients of Kenneth Kushner, MD.

Dear Patients:

This correspondence is to provide notice to our patients that Dr. Kenneth Kushner will be leaving the practice to join the trauma team at Mission Hospital. He will be providing care through June 30, 2017 when he transitions to the Trauma unit.

As a valued patient of SVSMG, you have several options for the continuation of your surgical care.  These choices include the following:

1.Your care can be easily transitioned to one of Dr. Kushner’s experienced surgical partners at SVSMG.  Our physicians would be honored to participate in your on-going and follow up surgical care.  

2.  You may choose to select another general surgeon outside the SVSMG physician group.  A list of general surgeons in Orange County can be found by contacting the Orange County Medical Association at www.ocma.org or 949.398.8100 or the American College of Surgeons at www.facs.org or 800.621.4111.

3.  You may choose to discuss your surgical options with your Primary Care Physician to aid in the selection of another general surgeon.

If you choose to move to another physician, you will need to request a medical record transition form from our office.  Once this form is completed, a copy of your records will be transferred to your selected general surgeon.  This form will not be necessary if you choose to remain with one of the SVSMG surgeons.

All of us in the Southern California community are appreciative that Dr. Kushner will be participating in covering emergency surgery at our local hospital. As his surgery partners, we have every confidence that we can continue to deliver the excellent elective surgical care that you have come to expect from Saddleback Valley Surgical Medical Group. Thank you for choosing SVSMG and allowing us this opportunity.


Dr. Ralph Maeda

Dr. Kenneth Kushner

Dr. John Shaver

Dr. Jayanth Sanampudi

Dr. Louise Bacon

To our patients and friends of Dr. Jay Sanampudi:

On Friday October 12, 2018, Dr. Sanampudi was involved in a tragic car accident which claimed his life.  The loss of our friend, partner and colleague has saddened everyone involved including family, friends and patients.  We will dearly miss him and his positive “can do” attitude for any project.  His memories and contributions will live on forever in our lives.

We are dedicated to providing the best surgical care and treatment that you have come to expect with Dr. Sanampudi.  Our physicians and staff are working diligently to provide continuity of care for all of Dr. Jay’s patients both in the surgical and office areas.   Please keep us in your thoughts as we work through this loss and begin the process of adjustment to meet the needs of his prior, current and future patient population. 

Please contact us at the office with any medical concerns, needs, or questions that may have arisen as a result of this tragedy.   Our team is here to serve and to ensure the completion of your surgical care.

Thank you for your support and prayers during this difficult time.


Dr. John K. Shaver

Dr. Louise N. Bacon

Dr. Ahmad Abou Abbass

Dr. Kenneth D. Kushner