please wait
close window

Meet Our Weight Loss Surgeons and Staff

William A. Graber, MD, PC consists of a talented team of caring, talented, and dedicated healthcare professionals based in Syracuse and Utica. Our surgeons have performed more than 6,000 weight loss surgeries at Faxton-St. Luke's Healthcare in Utica/New Hartford, NY and St. Joseph's Hospital Health Center in Syracuse, NY. 

Throughout your weight loss surgery journey you will work not only with your surgeon but our entire bariatric surgery team. This includes our physician assistants, nurse practitioners, nurses, registered dietitian, administrative staff and insurance specialists.

Our Surgeons

Photo Of William A. Graber, Specialist in Weight Loss Surgery, New York - William A. Graber, MD, PC
William A. Graber, MD, FACS, Weight Loss Surgeon

Dr. William Graber recognized the need for a weight loss surgery program in Upstate New York in 2002 and has been performing bariatric surgery since then. His practice has performed over 6,000 bariatric surgeries on those affected by obesity, in both his Utica/New Hartford and Syracuse, NY  locations. He holds a bachelor’s degree from Haverford College in Pennsylvania and a medical doctorate from SUNY Downstate Medical Center.  He completed his residency at Boston University and is a Fellow of the American College of Surgeons (FACS) and a member of the American Society for Metabolic and Bariatric Surgery (ASMBS).

Photo Of January Hill, Specialist in Weight Loss Surgery, New York - William A. Graber, MD, PC
January A. Hill, MD, FACS, Weight Loss Surgeon

Dr. Hill earned her Bachelor of Science in Biology with a minor in Chemistry from Xavier University of Louisiana in New Orleans, Louisiana, and her Doctor of Medicine from Texas Tech University Health Sciences Center School of Medicine in Lubbock, Texas. She completed an internship and residency in Surgery at SUNY Buffalo in Buffalo, New York, and a fellowship in Laparoscopic and Bariatric Surgery at Inova Fairfax Hospital in Falls Church, Virginia. Dr. Hill is board certified in Surgery and is a member of the Society of American Gastrointestinal and Endoscopic Surgeons and the American College of Surgeons.
Photo Of Vladan Obradovic, Specialist in Weight Loss Surgery, New York - William A. Graber, MD, PC
Vladan Obradovic, MD, Weight Loss Surgeon

Dr. Obradovic earned his degree in Nursing in Krusevac, Serbia, Yugoslavia. He received his medical degree and postgraduate master’s degree from the University of Belgrade School of Medicine in Belgrade, Serbia, Yugoslavia. He completed a fellowship in Digestive System Surgery at the Institute for Digestive Diseases, First Surgical Clinic University, Clinical Center of Serbia, Belgrade in Yugoslavia, where he also became a staff surgeon at the Clinical Department for Hepatobiliopancreatic Surgery. Dr. Obradovic completed a residency and fellowship in Bariatric and Minimally Invasive Surgery at Geisinger Medical Center in Danville, Pennsylvania.

Physician Assistants and Nurse Practitioners

Our dedicated Physician Assistants and Nurse Practitioners are an integral part of our bariatric surgery team. They work hard in the operating room and our offices to help support patients throughout their weight loss surgery journey 
Laura Buschmann, RPA-C
Laura Buschmann, RPA-C, Physician Assistant
Laura is a surgical assistant for Dr. Graber. She assists in the OR, and sees patients post-operatively, during hospital rounds, and for follow-up visits in our office. Laura also helps with patient education prior to and following surgery.

A graduate of Hamilton College and the Physician Assistant Program at LeMoyne College, Laura has worked in the medical field since 1991.
Rajendra Shrestha, RPA-C
Rajendra Shrestha, RPA-C
Rajendra graduated Summa Cum Laude with a Bachelors Degree in Biology from Southeastern Louisiana University. He obtained his Masters of Science in Physician Assistant Studies from DeSales University in Pennsylvania. He is an inhabitant of Nepal and came to the US in 2009. He is interested in travel and photography. Rajendra is licensed as a Physician Assistant by the University of the State of New York Education Department, Office of the Professions and certified by the National Commission on Certification of Physician Assistants (NCCPA).

Clinical Staff

Lisa Taurisano, RN
Lisa Taurisano, RN, BSN, CBN
Lisa is the clinical manager responsible for overseeing the nursing staff in the practice. She is an allied health member of the American Society for Metabolic and Bariatric Surgeons. She received her certification in bariatric nursing in 2008.

Lisa has worked in healthcare since 1992, and has been with Dr. Graber's office since 2004. Lisa earned her RN from MVCC in 1995 and recently completed her BSN degree from Utica College.
Evelyn Mariani, MS, RD
Evelyn Mariani, MS, RD, CDN 
Evelyn provides nutrition counseling to our patients undergoing weight loss surgery. She strives to find creative ways to help each individual adapt to the lifestyle changes needed after their operation. Her professional experience includes weight management, cardiovascular health, renal disease, diabetes, gastrointestinal disorders, nutrition in the elderly, eating disorders, and food allergies.

Evelyn holds a master's degree from New York University and a bachelor's from Marymount College of Fordham University. She completed a dietetic internship at the Bronx Veterans Affairs Medical Center and is certified in childhood and adolescent weight management by the Academy of Nutrition and Dietetics.

Practice and Billing Manager

Theresa Sullivan
Theresa Sullivan
Terry was educated at Utica School of Commerce.  She has many years of professional experience, and has worked for Dr. William A. Graber's office since 1999.  Terry oversees all operations in both of our office locations. 


For more information on our bariatric surgery team, New York residents can contact our locations in Syracuse or Utica.