LifeWeigh Bariatrics Staff

Our Staff practices a comprehensive holistic team approach with multi-disciplinary medical caregivers who participate in the diagnosis and ongoing treatment of overweight patients. Our Mission is to assist each patient in achieving their weight loss and health objectives through comprehensive surgical care and education of unmatched quality and value.

Introducing the LifeWeigh Staff:


Jeffrey Rosen, MD, FACS, MBA

Bariatric Surgeon: Dr. Jeffrey Rosen is the lead surgeon for LWB. He is board-certified in general surgery and has been in practice for over 13 years. Dr. Rosen has taught Bariatric surgery to many surgeons around the country. He has been involved in almost 1000 weight loss surgeries. He has also served as Co-medical director in the Trauma department at Good Samaritan Hospital in the past. His dedication to advancing knowledge of surgical techniques and technology are reflected in his active memberships in various medical associations including American Society of Bariatric Surgery, the Society for Critical Care Medicine, the Society for American Gastrointestinal Endoscopic Surgeons, and the Chicago Medical Society. In the academic arena, Dr. Rosen is an Affiliate Clinical Instructor at the Midwestern University College of Osteopathic Medicine, and his research has been published in various medical publications, including the Journal of Trauma and Surgical Endoscopy. Dr. Rosen received his medical degree from the University of Illinois at Chicago, where he also served his residency.  


Allen T. Mikhail, MD, FACS

Bariatric Surgeon:  Dr. Allen Mikhail is a surgeon at LifeWeigh Bariatrics with special interests in Laparoscopic Roux-en Y Gastric Bypass, Adjustable Gastric Banding, Sleeve Gastrectomy, Gastrointestinal Surgery, Intragastric balloon and Endoscopic revision procedures.  He is fellowship trained in Advanced Laparoscopic and Bariatric Surgery from the Cleveland Clinic which shows his dedication to minimally invasive surgery and committed interest in the treatment of obesity.  He is also board-certified in surgery by the American Board of Surgery.  He has been the investigator on many research grants and has published numerous papers, abstracts and book chapters related to nutrition, laparoscopic gastrointestinal and bariatric surgery.  Memberships in professional and scientific societies include the American College of Surgeons, Society of Laparoendoscopic Surgeons, American Society for Metabolic and Bariatric Surgery (ASMBS) and Society of American Gastrointestinal and Endoscopic Surgeons (SAGES).  

Certified Nurse Practitioner: Karyn L. Skleney, MSN, APN, NP-C is our nurse practitioner who has worked in the field of bariatrics/general surgery for over 30 years.  She is a graduate of Elmhurst College where she received a Bachelor of Arts in Psychology and subsequently a Bachelor of Science Degree in Nursing.  She completed her Masters degree in Nursing at North Park University and is a Certified Nurse Practitioner.  She is a member of the American Society for Metabolic and Bariatric Surgery (ASMBS). 

Practice Manager: Gail R. Rosen, RN, MSN/MBA, is our practice manager and has extensive clinical experience in the Intensive Care Unit.  Gail has received a Master's of Science in Nursing and a Master's in Business Administration from the University of St Francis. 

Office Manager: PJ Stough joined the LifeWeigh team in October of 2009. PJ had gastric bypass surgery July 21, 1999 and lost 162 pounds.  Inspired by the way surgery changed/saved her life, she began working with bariatric patients on an informal basis.  In 2002, she joined The Kane Center as their Bariatric Coordinator where she worked with patients, conducted informational seminars and ran support groups.  PJ has also worked as a manager of a weight loss program in Arlington Heights and started a Lap-Band program at a surgery center in Chicago.  She is a Certified Support Group Leader and a member of the American Society for Metabolic and Bariatric Surgery (ASMBS) and the Obesity Action Coalition (OAC). For the past five years, she has also served as the Chairperson for the Northern Illinois Walk from Obesity.

Dietitian: Dana Petersen White, MS, RDN, LDN is a registered and licensed dietitian who has a passion for nutrition, exercise and people.  She has clinical experience in weight management and bariatric surgery.  She enjoys giving presentations and developing new ways to make nutrition easy to understand and implement.  Dana graduated from Purdue University and completed her dietetic internship at the University of Houston and her Masters Degree in Nutrition and Wellness at Benedictine University.  She has also attained a certificate of training in Adult Weight Management through the Academy of Nutrition and Dietetics.

Exercise Physiologist: Joey Bonavota, MS has been working in the field of bariatrics since 2002. He is an alumni of Eastern Illinois University, where he received both his Bachelor and Masters degree in the field of exercise science. He has also gained practical experience in the field of cardiac rehabilitation. Joey brings a unique prospective into the field of exercise science through these previous endeavors. He has a restless schedule but he wouldn’t want it any other way.

Medical Assistant: Keshia Wright recently graduated from Everest College in Aurora with a certificate in medical assisting and is excited to share her enthusiasm and knowledge with those patients beginning their lifestyle changes.  Previously, Keshia has worked in a buyer's office and as a vault clerk.