Bariatric Surgeons & Specialists

Our team is led by board-certified bariatric surgeons, Rami Lutfi, M.D., and Frederick Tiesenga, M.D.. Highly regarded in the field, both weight loss surgeons are drivers of innovation, offering the most advanced weight loss procedures available and sharing their expertise by teaching other surgeons to perform successful bariatric procedures.

Our surgeons work together with a dietitian, nurse bariatric coordinator, advance practice nurse, psychologist and insurance specialist - here to help you live a fuller, healthier life. Together, we address every aspect of weight loss, from lifestyle changes to surgery to emotional support.

Rami Lutfi, M.D., F.A.C.S.

Dr. Rami Lutfi is a nationally recognized, board-certified bariatric surgeon, Clinical Assistant Professor at the University of Illinois at Chicago and President of the Illinois Association of Bariatric Surgery. He has performed hundreds of bariatric procedures and has written extensively about the subject of weight loss surgery for leading medical journals. Dr. Lutfi teaches other surgeons to perform minimally invasive bariatric surgery. Learn more.

Frederick Tiesenga, M.D., F.A.C.S.

Highly regarded in the field, Dr. Frederick Tiesenga received his medical degree from the University of Illinois, College of Medicine, and performed his residency clinical training at Metropolitan Group Hospitals in Chicago. Dr. Tiesenga is an affiliate surgeon of the American Society of Bariatric Surgeons and is on the board of the Illinois Association of Bariatric Surgery. He is a U.S. Surgical Proctor for Bariatric Surgery and has trained surgeons from around the world to perform sleeve, bypass and gastric banding. Dr. Tiesenga is a Center of Excellence certified surgeon and has brought several programs to Center of Excellence status. Learn more.

Seth C. Teske, R.N., C.V.R.N. - Bariatric Nurse Coordinator

Our Bariatric Nurse Coordinator, Seth Teske, will help you navigate through the entire weight loss process - from pre-operative decision-making through the procedure itself and with post-operative follow-up care. He is here to provide you with answers and encouragement along the way and offer support over the long-term to help you reach and maintain your goals. Learn more.

Kim Mahoney, M.S., R.D., L.D.N. - Program Dietician

Specializing in bariatric nutrition, Kim Mahoney works closely with you before and after surgery to provide information about nutritional guidelines and to help you navigate meal choices based on your personal preferences. She serves as your educator, supporter and cheerleader to help you stay on track and achieve your personal weight loss goals. Taking an active role in post-operative support groups, Kim also brings patients together so they can find support in each other. Learn more.

Jennifer A. Duffy, FNP-BC - Family Nurse Practitioner

Jennifer A. Duffy is also here to help you throughout the journey. She provides pre- and post-surgical education, helps you understand the various surgical techniques and aides our doctors in surgery, recovery and post-operative management. Learn more.

Christine Garcia - Insurance Specialist

Christine Garcia has over 10 years of experience in working with insurance companies and understanding their processes. The insurance process involved with bariatric surgery can be quite overwhelming. Christine will help you to understand how insurance companies provide coverage for bariatric surgery and guide you along the way.

Michelle Holliday, PhD - Psychologist

With the primary aim of helping you achieve your weight loss goals, Dr. Michelle Holliday supports our patients from the emotional and psychological standpoint. She helps identify psychosocial risk factors and makes recommendations to ensure that you have the best possible outcomes from your procedure. She also provides post-operative follow-up care as needed. Learn more.

We understand that

diets don't always work

Obesity is a serious and complex disease that affects the lives of 30% of Americans. At The Chicago Institute of Advanced Bariatrics, we have the experience and tools to help you overcome obesity. We offer a complete range of surgical solutions to help you lose weight and the long-term support to help you keep it off.

In the News

NEW Laparoscopic Gastric Plication

Meet Laura who is back to playing with her kids, doing housework, feeling good and living life again.