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Our Bariatric Surgery Team

Our Experts are at Your Service

We know that making the decision to undergo bariatric surgery isn’t something you take lightly. Our team with the MultiCare Bariatric Surgery Program is here to support you every step of the way.

Our program is built around the expertise of our lead surgeons and a program coordinator. Along with these providers, you will also have access to a full team of bariatric surgery, nutrition and weight-loss experts, either within our program or within the larger MultiCare system.


james sebesta

James Sebesta, MD

Board-certified Bariatric Surgeon,
Medical Director of Bariatric Surgery

James Sebesta, MD treats obesity, gastroesophageal reflux disease, abdominal wall hernias, breast cancer, as well as other gastrointestinal surgical diseases.

Dr. Sebesta is a Fellow of the American College of Surgeons, and a Fellow of the American Society of Metabolic and Bariatric Surgeons. In his free time, he enjoys fishing, outdoor sports and watching his children’s sporting events.

Kelly Blair

Kelly Blair, MD

Board-certified Bariatric Surgeon

Dr. Blair is a board-certified surgeon, specializing in bariatric surgery. He has expertise in robotic and laparoscopic procedures, offering treatment for a wide array of conditions, including severe reflux and GERD. LINX surgery allows these patients to immediately resume normal activities.

Dr. Blair received his medical degree from Rush Medical College in Chicago. He then went on to complete his residency at Vanderbilt University Medial Center in Nashville, before returning to Chicago for his fellowship work at the University of Chicago School of Medicine.

Away from work, Dr. Blair enjoys learning languages, studying other cultures and foreign travel. He also dedicates time to serving the community through medical missions and participating in his church’s outreach programs.

Hanafy Hanafy MD

Hanafy Hanafy, MD

Board-certified Bariatric Surgeon

Board-certifed in general surgery, Dr. Hanafy has a dozen years of experience performing bariatric surgeries, and brings this expertise to MultiCare's Bariatric Surgery program.

Dr. Hanafy earned his medical degree from Alexandria University in Egypt. He moved to the United States in 1989, and went on to complete his general surgery residency training at the University of Illinois, Chicago, in 1996.

In addition to his board certification in general surgery, Dr. Hanafy is also a Fellow of the American College of Surgeons, a Fellow of the Royal College of Surgeons of Edinburgh, UK, a member of the American Society of Metabolic and Bariatric Surgery (ASMBS) and a member of the Society of American Gastrointestinal and Endoscopic Surgeons (SAGES). Individualized attention to his patients and a keen interest in long-term successful outcomes of surgery drive his personable approach.


Diana Whiteaker, PA-C

Diana Whiteaker is a certified physician assistant specializing in the preoperative and postoperative management of patients in the surgical weight-loss program. She is a dependable and genuine provider who enjoys getting to know her patients and supporting them through their healthcare journey. Diana was inspired to choose a career in healthcare after being diagnosed with a chronic illness and being surrounded by supportive healthcare providers who educated her about her disease and listened to her concerns.

Had she not pursued a career in healthcare, Diana would have been an FBI profiler. Away from work she enjoys watching and playing sports and relaxing with her pets.

Jennene Wheeler RN

Jennene Wheeler, RN, CBN

Certified Bariatric Nurse, Bariatric Program Coordinator

Jennene earned her nursing degree in 1998, has worked in the field of Bariatrics since 2003 and was one of the first nurses in Washington state to become a Certified Bariatric Nurse. She joins MultiCare from Dr. Hanafy's previous practice.

Jennene's experience in Bariatrics ranges from serving as a bariatric surgery assistant in the OR to serving as a bariatric clinic supervisor. Jennene has the added expertise of having experienced bariatric surgery herself. This gives her unique insight into the patient's experience, allowing her to guide the program with true compassion and understanding. Together, she, Dr. Hanafy and Dr. Sebesta bring an in-depth understanding of how to best serve and support bariatric surgery patients through their weight-loss journey, from initial consultations through post-surgical recovery and long-term weight-loss success.



Colette DeMonte, PsyD


Colette DeMonte, PsyD, earned a doctorate in psychology and her current practice specializes in bariatric surgery. As a central part of the care team, Colette meets with patients at the beginning of their weight-loss journeys to help them determine if bariatric surgery is right for them. Then, she helps prepare patients for surgery by providing education and resources to support them throughout the pre- and post-operative periods.

Treatment philosophy:

"We are continuously in motion toward progress. In attempts to maintain our momentum, difficult choices may need to be made to be considered. Sometimes we get stuck when we find ourselves paralyzed by the fear of making the wrong choice. As a provider, I work alongside patients to discover the path that is right for them. Together we explore their values and strengths, which informs the decision-making process. Ultimately, the patient recognizes the choice that aligns with what is important to them."



Jackie Fagan, MS, RDN, CD, CEP

Lead Dietitian, Surgical Weight Loss

Jackie is a registered dietitian and certified clinical exercise physiologist. She received her master’s degree in nutrition and exercise physiology from Washington State University, where she also earned minors in Spanish and psychology. She completed rotations at Tacoma General and St. Peter hospitals and a number of outpatient facilities working in clinical nutrition, patient counseling, and cardiac rehabilitation. Jackie sees patients at the Center for Weight Loss & Wellness’ main clinic in Tacoma, as well as at the Gig Harbor Medical Park.

Nora Delavari, MS, RDN, CD

Nora Delavari, MS, RDN, CD

Nora is a registered dietitian and has been working in weight loss and bariatric surgery since finishing her education. She received her bachelor of science in nutrition from Bastyr University and has a master's degree in human sciences from Texas A&M University. She is a member of the Academy of Nutrition and Dietetics and holds a Certificate of Training in Obesity Interventions for Adults through the Commission on Dietetic Registration. Nora is passionate about helping people achieve their weight-loss goals and tailors her nutrition recommendations based on patients' individual beliefs and preferences. In her free time Nora enjoys fostering dogs for the Seattle Humane Society, running, playing piano and spending time with her family.

Kari Due

Kari Hall, RDN, CD, CSOWM

Kari is a registered dietitian and a board-certified specialist in obesity and weight management (CSOWM). She received her bachelor of science in nutrition from Bastyr University in Seattle, and completed her dietetic internship at Oregon Health & Science University in Portland, Oregon in 2004.

Kari has been focusing on helping people meet their weight-loss goals since 2011. She sees surgical weight loss patients at the Center for Weight Loss & Wellness’ main clinic in Tacoma.


Hannah Hugo, MS, RDN, CD

Hannah is a registered dietitian nutritionist who graduated from Central Washington University with a masters in nutrition. Since completing her masters and prior to joining MultiCare she worked in a skilled nursing facility that specialized in behavioral and social health. Her professional interests are in weight loss and weight management. Hannah's patient care philosophy is to provide a comfortable and supportive environment to patients as they progress on their journey to a reaching a healthier lifestyle and achieving their goals.

Kris Davis LeshKris Davis Lesh, RD, CD

Kris is a registered dietitian who earned her bachelor of science degree from Oregon State University and completed her internship with Oregon Health Sciences University in 2010. Since then she has been working primarily in the weight loss field, as well as working in an outpatient setting to help people gain control of their diabetes through adopting a healthy diet.

Kris describes herself as passionate about weight loss and is excited to help people improve their lives and feel empowered by the dietary changes she encourages. She works out of our Olympia clinic.


Joseph Tintera, MA, RDN, CD

Joe is a registered dietitian nutritionist who specializes in bariatrics, weight loss and wellness. He earned his undergraduate degree at Southeast Missouri State University in nutrition and dietetics while also pursuing courses in exercise sciences. He completed his dietetic internship and master’s degree in health communications at Fontbonne University in his hometown of Saint Louis, Missouri. During his time as an intern Joe completed various rotations within both surgical weight loss sites and outpatient settings focusing on weight loss and wellness and has since worked in both post-acute rehab and outpatient settings. In these roles Joe has helped patients to manage their health and improve their wellbeing using individualized medical nutrition therapy. While working with patients, Joe believes that education is one of the most powerful tools for affecting positive and lasting lifestyle changes and focuses on empowering patients with education to achieve their goals. Joe currently sees surgical weight loss patients at MultiCare’s Center for Weight Loss & Wellness in Tacoma.

>Nancy Vander Linden, RD, CD

Nancy Vander Linden, RD, CD

Nancy is a registered dietitian and a board-certified specialist in obesity and weight management. She earned her degree from Central Washington University and completed her dietetic internship with Sea Mar Community Health in Seattle, WA. Nancy is fluent in Spanish and has been aiding individuals in their weight loss since 2013.

Nancy is committed to providing high quality patient centered care and together with you and your health care team will work towards building a happy healthy lifestyle facilitated through nutrition and physical activity.

Ready to Learn More?

MultiCare’s weight-loss surgery program can help you improve your health, lose weight and feel better. Attend our free, no-obligation online seminar to learn more.

Online Seminar

Weight-Loss Surgery Assessment

Learn if weight-loss surgery is right for you and what steps you can take to identify and address weight-related concerns. 

Start Now

Weight-Loss Support Group

Each support group features a scheduled topic, as well as time for open discussion tailored to meet attendees' needs.

Find a Virtual Support Group

Out of an abundance of care and caution for our community and patients during the ongoing novel coronavirus (COVID-19) situation, we will not be offering in-person support groups for the remainder of the year. All support groups will take place in a virtual setting.

MultiCare Center for Weight Loss & Wellness

View our convenient Puget Sound locations to find a clinic near you.

Or, call us at 253-301-5280 or toll-free at 844-256-7659 to learn more about our Bariatric Surgery and Medical Weight-Loss programs.