Mercy Weight Management Team

Joseph G. Vrabel, DO
Medical Director

Dr. Joseph Vrabel | weightloss physician canton ohioDr. Vrabel received his medical degree from the Kansas City College of Osteopathic Medicine with postgraduate training at Doctors Hospital of Stark County. Dr. Vrabel is board certified by the American Osteopathic Board of Family Medicine and serves as the medical director of the OPTIFAST® weight management program.

Sereen Zawahri Krasuna
Program Coordinator

Sereen Zawahri Krasuna | Mercy Weight Management | Canton Ohio WeightlossSereen Zawahri Krasuna, MS, RD, LD, is a registered and licensed dietitian as well as our program coordinator. She has worked in clinical and wellness settings. She is bilingual as our Arabic speaking team member. Sereen attended The University of Akron where she earned her bachelor’s degree in dietetics. She completed her master's degree in nutrition from Kent State University where she wrote her thesis on organic food. In addition to helping others achieve their goals, Sereen enjoys traveling with her husband, being involved in her church, and spending time with her family. 


Kate Anderson, Outpatient Dietitian
Kate Anderson | Mercy Weight Management | Weightloss Canton OhioKate Anderson is a registered and licensed dietitian with the OPTIFAST program. Kate earned her bachelor's degree in dietitics from Bowling Green State University and completed her internship at Texas State University. She has more than seven years of experience with lifestyle behavior change and is passionate about educating and empowering others to achieve their personal best. Kate enjoys spending time outdoors and camping with her family.

Adam Koehler, MHS, PA-C
Adam Koehler PAC | Mercy Weightloss Canton OhioAdam Koehler is a physician assistant with the OPTIFAST program and with Mercy Work Health and Safety Services. He began his Mercy career eight years ago in the emergency department where he continues to work part time. Adam graduated from Duke University with his master’s degree in physician assistant studies in 2008 and completed his undergrad studies with a bachelor’s degree in biology from John Carroll University in 2005. In the past, he was a faculty member for the Mount Union Physician Assistant Program and enjoys continuing to precept students in both the emergency department and occupational medicine settings. 

Linda Telle, Program Representative
Linda Telle | Mercy Weight Management | Canton Ohio Weight lossLinda Telle is the program representative for Mercy Weight Management. She has worked in medical office management for 12 years, including nine with the OPTIFAST program. She enjoys supporting and encouraging clients as they strive to reach their weight-loss goals. Previously a registered radiologic technologist, Linda is a graduate of Aultman Hospital Radiologic Technology Program. In her spare time, Linda enjoys watching sports, hiking, and spending time with friends and family.  

Michael Valentino, PA-C
Mike Valentino PAC | Mercy Weightloss Canton OhioMichael Valentino is a physician's assistant with the OPTIFAST Program at Mercy Medical Center and Mercy Work Health and Safety. Michael previously spent 20 years as a surgeon's assistant at Mercy. He holds degrees from Akron University (surgical assistant and technical education), the University of the State of New York (nursing degree), Cuyahoga Community College (physician's assistant - certified), a masters degree from the University of Nebraska (physician's assistant studies) and Duke University (certificate in occupational and environmental medicine).