MEDICAL TEAM

Dr. Suzanne Bentz, D.O., Founder
& Chief Medical Officer

Dr. Kim Feinstein, Psy.D., Behavioral Weight Loss Specialist

Dr. Shelly Kocher, M.D., FACOG, Medical Director

Heather Wright, FNP-C, Clinical Assistant Director

Amie Pena, MSN, FNP-C,
Lead Injector

Deanna Turner-Garcia, FNP-BC

Jacquelyn Sanchez, MSN, FNP-C

Abigail Marley, DNP, FNP-C

Sanya Beronja, MSN, FNP-C

Alice Whittington-Gulba, DNP, FNP-C

Claire Norbut, MSN, FNP-C

Lindsey Purcelley, MSN, FNP-C

Sommer Mattingly, FNP

Noelle Strunk, FNP-C

Kateryna Whitehurst, ACNP-BC, MSN, CNRN

Tim Knoll, PA-C

Becca Newberry, RN, MSN, FNP-C

Tracy Bowers, Aesthetic RN & Laser Certified Technician

Jillian Maang, DNP, AGNP-C

Sasha Gordon, Aesthetic RN

Lauren Davis, FNP-C

Kari Bruner, AGCNS-BC

Bridgett Hodridge, FNP-C

Katie Lemke, FNP

Apryl Witherspoon, MSN, APRN, FNP-C

Valerie Roberts, MSN, APRN, FNP-C

Monica Olson, CNP

Linda Briggs headshot small

Linda Briggs, Aesthetic RN

MEDICAL TEAM

Dr. Suzanne Bentz, D.O., Founder & Chief Medical Officer

Dr. Suzanne Bentz, D.O., Founder
& Chief Medical Officer

Red Mountain Weight Loss is a medical practice that specializes in the most advanced methods available for medical weight loss, under the care of a physician. Medical Director and Owner, Dr. Suzanne Bentz, has practiced medicine for over 20 years, pursuing a lifelong passion of helping patients lose weight. She is a member of the Obesity Medicine Association, and strongly believes that a physician is most qualified to help patients achieve safe and effective weight loss. Dr. Bentz leads a team of talented medical professionals, who have also received advanced training in medical weight loss.
Dr. Bentz attended Texas Christian University, where she studied nutrition/health science. She received her D.O. degree in 1993 from North Texas Health Science Center. In 1993, she started Red Mountain Family Medicine. Many of her patients required treatment for conditions such as diabetes, high blood pressure and high cholesterol, all related to obesity.
With a passion to further help her patients, she became Board Certified in Bariatric Medicine in 1997, further specializing in the treatment of obesity and related diseases. This led to the decision to open Red Mountain Weight Loss offices throughout Arizona.
Dr. Suzanne Bentz D.O.
Owner & Medical Director
Diplomate of the Obesity Medicine Association
Certified in Family Practice and Obesity Medicine

Dr. Kim Feinstein, Psy.D., Behavioral Weight Loss Specialist

Dr. Kim Feinstein, Psy.D., Behavioral Weight Loss Specialist

Dr. Kim Feinstein is a Licensed Clinical Psychologist and our Behavioral Weight Loss Specialist. She earned her Masters of Counseling degree from the University of Phoenix and earned her Masters and Doctoral degrees in Clinical Psychology from the Arizona School of Professional Psychology/Argosy University-Phoenix campus.
For over 15 years, Dr. Kim has been specializing in weight loss, long-term weight management, body image concerns, and eating disorders. She knows how to educate, guide, inspire, empower and motivate those concerned so that change in eating behaviors and body image can occur. In addition to eating issues, Dr. Kim has extensive experience treating mood and anxiety disorders, relationship issues, and life adjustment problems.
At Red Mountain Weight Loss, we recognize that weight gain can affect more than just physical appearance, it can affect psychological thoughts and behaviors, which can take a toll on an individual’s mental and emotional state and well-being. In addition to helping you achieve your weight loss goals and overall quality of life.
Dr. Kim will be providing tools, tips and motivation to help uncover the root issues related to food and weight gain. To hear more from Dr. Kim, make sure to check out our blog page on our website, “Follow Us” on Facebook, Instagram and Twitter.

Dr. Shelly Messer, M.D., FACOG, Medical Director

Dr. Shelly Messer, FACOG, Medical Director

Dr. Shelly Messer, a board-certified Obstetrician/Gynecologist, is our Clinical Administrator. She balances her time between patient care and administrative duties. She feels so privileged to celebrate the achievement of each patient’s weight loss goals as they reap the benefits of improved health, energy and self esteem.
As an administrator, Dr. Messer works closely with Dr. Suzanne Bentz, Owner and Director of Red Mountain Weight Loss, to oversee, train, manage and supervise the entire Clinical Team. She is a member of the American College of Obstetrics & Gynecology, Obesity Medicine Association, International Society for the Study of Women’s Sexual Heath and the Age Management Medicine Group. She has also received injectable training through Galderma, Palette Resources and the American Academy of Facial Esthetics.

Heather Wright, FNP-C, Clinical Assistant Director

Heather Wright, FNP-C, Clinical Assistant Director

Heather is a Board Certified Family Nurse Practitioner practicing at our Arcadia, Scottsdale, Arrowhead, and Glendale locations. She graduated with her Bachelor of Science Degree in Nursing from the Arizona State University and received her Nurse Practitioner and Masters Degree in Nursing from the University of Phoenix. Prior to working at Red Mountain Weight Loss, she worked for DMG doing primary care and Banner Thunderbird emergency room. Heather is currently a member of the American Academy of Nurse Practitioners. In her spare time enjoys hiking, shooting, shopping for shoes, and spoiling her nieces and nephews.

Amie Pena, MSN, FNP-C

Amie Pena, MSN, FNP-C

Amie Pena is a Board Certified Nurse Practitioner practicing at both our Scottsdale and Glendale locations. She graduated with her Bachelor of Science Degree in Nursing from Arizona State University and received her Nurse Practitioner and Masters Degree in Nursing from The University of Phoenix. Prior to working at Red Mountain Weight Loss, she worked at St. Joseph’s Hospital specializing in neurology. She is currently a member of the Coalition of Arizona Nurses in Advance Practice and the American Academy of Nurse Practitioners. In her spare time she enjoys hiking, traveling, scuba diving and spending time with family.

Deanna Turner-Garcia, FNP-BC

Deanna Turner-Garcia, FNP-BC

Deanna Turner-Garcia, N.P. began her advanced practice career path as a Board Certified Family Nurse Practitioner through the American Nurses Credentialing Center, with a focus on geriatric and adult populations. She has extended that focus to include Pain Management in an effort to support clients that are reaching towards a functional rehabilitation modality in achieving their highest potential for health and wellness. She graduated from University of St. Francis with honors as their 2010 outstanding student of the year. She is a member of Sigma Theta Tau International since 2005. She holds a dual Master’s level degree in Nursing and as a Family Nurse Practitioner.She joined Triad Pain Management Clinics, LLC in the fall of 2012 and is pleased to work Xly in collaboration with the most proficient and skilled specialist in the field of pain and rehabilitation in the valley. Deanna couples her experience with continued training to ensure she brings the most current modalities and treatments to the table.
Deanna sees herself as a gatekeeper for the client to move them forward on their path to healing and increase function ability. To that end she also advocates for other modalities and specialized treatments which are proven to enhance health, healing and well being of her clients.

Jacquelyn Sanchez, MSN, FNP-C

Jacquelyn Sanchez, MSN, FNP-C

Jackie Sanchez is a Board Certified Nurse Practitioner with several years of nursing experience in various specialties including Intensive Care Unit, Neonatal Intensive Care and Operating Room. She earned her Bachelor’s Degree in Nursing from the University of Arizona and her Master’s Degree in Family Nurse Practitioner from the University of Phoenix. Jackie is currently a member of the American Academy of Nurse Practitioners. In her spare time, she enjoys spending time with her husband and two children.

Abigail Marley, DNP, FNP-C

Abigail Marley, DNP, FNP-C

Abigail Marley is a Board Certified Family Nurse Practitioner with several years of experience in critical care, family medicine, and Medical Weight Loss. She is also a certified aesthetic injector. Abigail graduated Summa cum Laude with a Bachelors of Science in Nursing from the University of Arizona in 2003 and received her Masters of Science in Nursing and certification to become a Family Nurse Practitioner from University of Arizona in 2008. She earned her Doctorate of Nursing Practice from Arizona State University in 2016. Abigail is grateful for the opportunity to help guide, support and motivate patients in their personal journeys toward achieving optimal health and wellness.
Abigail is a member of the American Academy of Nurse Practitioners, Arizona Nurses Association, Sigma Theta Tau International Honor Society of Nursing, and the Honor Society of Phi Kappa Phi. In her spare time, Abigail enjoys running, yoga, hiking and spending time with her daughter and two rescue dogs.

Sanya Beronja, MSN, FNP-C

Sanya Beronja, MSN, FNP-C

Sanya Beronja is a Board Certified Family Nurse Practitioner practicing at both our Glendale location and our Mesa Family Medicine location. She graduated with her Bachelor of Science Degree in Nursing from the Arizona State University and received her Nurse Practitioner and Masters Degree in Nursing from the University of Phoenix. Prior to working at Red Mountain Weight Loss, she worked at Banner Thunderbird emergency room for a few years. Sanya is currently a member of the American Academy of Nurse Practitioners. She is married, has two dogs and in her spare time enjoys hiking, camping, and visiting with family and friends.

Mandy Meitz, ANP-BC

Mandy Meitz, ANP-BC

Mandy Meitz is a Board Certified Adult Nurse Practitioner. She graduated with her Bachelors of Science Degree in Nursing as well as her Masters from Goldfarb School of Nursing at Barnes Jewish College in St Louis, Missouri. She is a member of the Sigma Theta Tau International Honor Society as well as the American Academy of Nurse Practitioners. Prior to working at Red Mountain Weight Loss, she has had several years of experience working in step down ICU; specializing in neurology and cardiology. She was also on the hospital board and managed the heart failure clinic. In her spare time she enjoys hiking, cooking, traveling, fashion, and spending time with her husband and son.

Alice Whittington-Gulba, DNP, FNP-C

Read Bio

Alice Whittington-Gulba, DNP, FNP-C

Alice Whittington-Gulba is a Board Certified Family Nurse Practitioner. She graduated with her Bachelor of Science Degree from the Pennsylvania State University and received her Doctorate and Masters of Science from Frontier Nursing University.
Prior to working for Red Mountain Weight Loss, she worked at a family practice in a rural health clinic and has more than 7 years of hospital nursing experience in the intensive care unit and in labor and delivery. She is currently a member of the American Academy of Nurse Practitioners. She is married with one child and enjoys her free time traveling, running and cycling.

Claire Norbut, MSN, FNP-C

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Claire Norbut, MSN, FNP-C

Claire Norbut is a board certified Family Nurse Practitioner. She completed her undergraduate studies at the University of Arizona, and received her Masters of Science in Nursing, Family Nurse Practitioner from the University of Phoenix. Prior to Red Moun Weight Loss, she worked in trauma intensive care, where she developed a special passion caring for burn patients. She is a member of the American Association of Nurse Practitioners, the Southern Arizona Nurse Practitioner Society, and Sigma Theta Tau Honor Society of Nursing. In her spare time she enjoys fitness classes at Orange Theory, salsa dancing, and interior design.

Lindsey Purcelley, MSN, FNP-C

Lindsey Purcelley, MSN, FNP-C

Lindsey Purcelley is a Board Certified Nurse Practitioner. She graduated with her Bachelor of Science Degree in Nursing from South Dakota State University and received her Nurse Practitioner and Master’s Degree in Nursing from Grand Canyon University. She is a member of the Sigma Theta Tau International Honor Society as well as the American Academy of Nurse Practitioners. Prior to working at Red Mountain Weight Loss, she worked in Women’s Health for 10 years. In her spare time she enjoys time with family and friends, traveling, and playing with her two daughters.

Sommer Mattingly, FNP

Sommer Mattingly, FNP

Sommer Mattingly is a Board Certified Nurse Practitioner. She graduated with her Bachelor of Science Degree in Nursing from Grand Canyon University and received her Nurse Practitioner and Master’s Degree in Nursing from The University of Phoenix. Prior to working at Red Mountain Weight Loss, she worked in Family Practice. As a registered nurse she worked at Banner University Medical Center Phoenix for sixteen years in high risk obstetrics and was a certified perinatal bereavement coordinator. She is currently a member of Sigma Theta Tau International. In her spare time she enjoys time with family, hiking, running, and watching her two sons play sports.

Noelle Strunk, FNP-C

Noelle Strunk, FNP-C

Noelle Strunk has been in the medical field for over ten years. She received her Bachelors of Science in Nursing from ASU and her Masters from the University of Cincinnati. She has worked as a Nurse for many years in obstetrics and now as a Nurse Practitioner in primary care. In her spare time, she travels as much as possible and enjoys hiking, yoga and Orange Theory. She is passionate about health and fitness and is thrilled to be a part of the Red Mountain team.

Kateryna Whitehurst, ACNP-BC, MSN, CNRN

Kateryna Whitehurst, ACNP-BC, MSN, CNRN

Kateryna Whitehurst is a Board Certified Acute Care Nurse Practitioner through the American Nurses Credentialing Center. She obtained her Bachelor of Science Degree in Nursing with honors and Womens Studies from the University of Wisconsin in Madison, Wisconsin and her Masters Degree in Nursing from Rush University in Chicago, Illinois. Prior to working at Red Mountain Weight Loss, Kateryna worked at Johns Hopkins Hospital in Baltimore, Maryland in the Neurological Critical Care Unit for 4 years and at Northwestern Medicine in Chicago, Illinois for 4 1/2 years in the Neurosurgery Department where she specialized in the management of complex brain tumors. She also received her certification in neuroscience nursing and is an active member of the American Association of Neuroscience Nursing. Kateryna has been recognized by her undergraduate and graduate programs for her scholastic achievements and by her previous coworkers, employers, and patients for her strong work ethic and patient care she provides. She has developed patient education materials, participated in committees focusing on improved patient outcomes and represented her previous departments in various campaigns. When she is not working, Kateryna enjoys spending time with her husband, working out, cooking and eating healthy, skiing, and visiting her family in Chicago.

Tim Knoll, PA-C

Tim Knoll, PA-C

Tim Knoll is a Certified Physician’s Assistant. He graduated from the University of Kansas and received his Masters in Physician Assistant studies from the Massachusetts College of Pharmacy and Health Sciences. He has worked in the Tucson community previously in Orthopedic and Cardio-thoracic Surgery, and is excited to help people pursue their goals with weight loss. He is married and enjoys his free time running and spending time with friends and family.

Becca Newberry, RN, MSN, FNP-C

Becca Newberry, RN, MSN, FNP-C

Becca Newberry is a Board Certified Family Nurse Practitioner. She graduated from Michigan State University with her Bachelors of Science in Psychology. She then went on to pursue her Bachelors in Nursing and then her Masters of Science in Nursing. Becca is a member of the National Honor Society of Nursing~ Sigma Theta Tau International and Coalition of Arizona Nurses in Advanced Practice. She is also certified in cosmetic injectables, including Botox® and fillers. Prior to joining Red Mountain Weight Loss, Becca specialized in hormone replacement but also has experience in Medical Surgical Nursing and extensive background in Hospice care. In her free time, she enjoys spending time with her husband and two children. Her hobbies include hiking, Crossfit and refinishing furniture.

Tracy Bowers, Aesthetic RN & Laser Certified Technician

Tracy Bowers, Aesthetic RN & Laser Certified Technician

Tracy has been in the aesthetic industry for over 8 years. She started out as a Licensed Aesthetician and later became an Aesthetic Injector, R.N.. She is a graduate of Oregon State University and Phoenix College with a degree in Nursing.
She holds multiple certificates and licenses in both Oregon and Arizona in Aesthetics and Injectables. Tracy stays current with dermal filler techniques and products by attending training seminars in advanced injectable techniques held by world renowned doctors in the Aesthetic field.
Tracy’s passion for health and fitness started years ago as an international gymnast, and she is dedicated to making others feel and look their best.

Jillian Maang, DNP, AGNP-C

Jillian Maang, DNP, AGNP-C

Jillian is a board-certified nurse practitioner in Adult-Geriatric Primary Care. She graduated with her Bachelor of Science in Nursing degree from the University of Arizona and her Doctor of Nursing Practice degree from Arizona State University. Prior to working at Red Mountain Weight Loss, Jillian worked in various medical-surgical settings for 5 years. She is a member of the American Academy of Nurse Practitioners and the Arizona Geriatrics Society. Jillian enjoys traveling, hiking, and spending time with her husband and 2 rescue dogs. She is passionate about helping patients reach their weight loss goals through healthy eating and lifestyle changes.

Sasha Gordon, Aesthetic RN

Sasha Gordon, Aesthetic RN

Sasha Gordon is a board certified registered nurse, originally from the Midwest. After working in the hospital for 7 years she transitioned her focus to specialize in aesthetic nursing. She has advanced training in dermal fillers, neutromodulators and laser aesthetics. She loves to learn and stays up to date on techniques, products and cosmetic procedures by regularly attending conferences and trainings. Sasha’s passion is pairing her medical background and artistic eye to provide an exceptional individualized plan. While making her patients not only look, but feel their very best with each service. When she’s not working she loves to spend time with her husband and 4 children, visit family, friends and traveling.

Lauren Davis, FNP-C

Lauren Davis, FNP-C

Lauren Davis is a Board Certified Family Nurse Practitioner. She graduated from Grand Canyon University with her Bachelor of Science in Nursing in 2008. She then went on to pursue her Masters of Science in Nursing Family Nurse Practitioner degree and graduated in 2018. Lauren is a member of the American Academy of Nurse Practitioners.
Prior to joining Red Mountain Weight Loss, Lauren worked for 10 years at Mayo Clinic Hospital on a Medical Surgical unit specializing in Gastrointestinal, Gynecological, and Palliative care. She has a passion for helping people work towards their weight loss goals and feel their best. In her free time, she enjoys spending time with her husband and 3 children who are the joy of her life. Her hobbies include hiking, shopping and spending time at her family’s cabin in Mormon Lake.

Kari Bruner, AGCNS-BC

Kari Bruner, AGCNS-BC

Kari Bruner is a Board-Certified Advanced Practice Registered Nurse, and has been in the medical field for over fifteen years. She received her Bachelors of Science in Kinesiology at Texas State University in San Marcos and her Masters of Science in Nursing at the University of Texas in Austin. Prior to joining the Red Mountain team, she worked in cardiology for several years. Kari is very passionate about health & wellness and is dedicated to helping her clients achieve and maintain healthy lifestyles. In her spare time, she enjoys running, weightlifting, yoga and spending time with family and friends, especially her two young children.

Bridgett Hodridge, FNP-C

Bridgett Hodridge, FNP-C

Bridgett Hodridge is a Board-Certified Family Nurse Practitioner. She graduated with her Bachelors of Science Degree in Nursing from the University of Texas at Arlington, then graduated with her Masters of Science from Angelo State University. She is a member of the Sigma Theta Tau International Honor Society of Nursing.
Prior to working at Red Mountain Weight Loss, Bridgette has had several years of experience in preoperative and postoperative nursing as well as experience in family practice, bariatrics and medical weight loss. In her spare time, she enjoys movies, fashion, singing, hanging out with friends, and spending time with her four children and her dog named Pfizer.

Katie Lemke, FNP

Katie Lemke, FNP

Katie Lemke is a Board Certified Family Nurse Practitioner who has worked in the medical field for more than 15 years. Katie graduated with her Bachelor of Science in Nursing from Grand View University in Iowa and received her Nurse Practitioner and Masters of Science in Nursing degree from the University of Arizona. In addition to her Nurse Practitioner degree, Katie also has a Masters of Science in Nursing with a focus on Nursing Education from Nebraska Methodist College..
Prior to joining Red Mountain Weight Loss, Katie specialized in pain management and internal medicine. Patient education and holistic care has always been Katie’s focus and true passion. Katie values spending time with her patients to help guide their specific and individualized plan of treatment. Through her extensive medical experience and working with patients who have various chronic health conditions, Katie finds helping patients reach their health goals a true honor and privilege.
In her spare time, Katie enjoys being active with her family and small yorkie. If she is not at the gym or outdoors, she may be out finding a new live music venue or at a book store.

Apryl Witherspoon, MSN, APRN, FNP-C

Apryl Witherspoon, MSN, APRN, FNP-C

Apryl Witherspoon is a Board-Certified Family Nurse Practitioner who has worked in the medical field for more than 11 years. She earned a Bachelor of Arts in Psychology at The University of North Texas, Bachelor of Science in Nursing at the University of Texas at Tyler, and her Masters of Science in Nursing at the University of Cincinnati. Apryl is a member of Sigma Theta Tau International Nursing Honor Society, North Texas Nurse Practitioners Association, International Association for Physicians in Aesthetic Medicine, and Delta Sigma Theta Sorority, Incorporated.
Prior to joining the team at Red Mountain Weight Loss, Apryl worked in critical care, emergency medicine, post-surgical, and orthopedics as a registered nurse. As a Nurse Practitioner, she has practiced in primary care, pain management, functional medicine, weight loss management, medical aesthetics, and urgent care settings. Apryl emphasizes chronic disease prevention and overall wellness. She is overjoyed when patients personally experience the benefits that healthy choices and an active lifestyle has in optimizing their health. She actively listens and educates her patients to ultimately help them achieve their personal healthcare and weight loss goals.
In Apryl’s spare time, she enjoys traveling, live music, spending time with her friends, family and Chihuahua, Dobby.

Valerie Roberts, MSN, APRN, FNP-C

Valerie Roberts, MSN, APRN, FNP-C

Valerie Roberts is a Board Certified Family Nurse Practitioner who has worked in the health care field for nearly 10 years. She graduated with her Bachelors of Science in Nursing from Stephen F. Austin State University. She graduated with honors from The University of Texas at Arlington, while obtaining her Masters of Science in Nursing Degree. She is a member of the American Academy of Nurse Practitioners and the Sigma Theta Tau International Honor Society of Nursing, Delta Theta Chapter.
Prior to joining Red Mountain Weight Loss, Valerie served the urgent care, family medicine, and occupational medicine community. She spent the vast majority of her nursing career serving the emergency medicine community, and also served as a nursing house supervisor. Her passion lies in providing superlative education with a patient-centered approach to the community in which she serves. Valerie believes that it is of paramount importance to offer quality care that is tailored to the unique needs of her patients. She strives to offer her patients the kind of care that our families deserve.
In her spare time, Valerie enjoys being active with her fiancé and 2 rescue dogs, Harvey and Gizmo. She enjoys running, traveling, adventure, fashion, and interior design.

Monica Olson, CNP

Monica Olson, CNP

Monica is a Board Certified Family Nurse Practitioner practicing at our Swan and LaCholla locations. She graduated with her Associates of Science Degree in Nursing from the University of South Dakota, received her Master’s degree in Nursing Leadership and Management from the University of Arizona and her Master’s Nurse Practitioner degree from Grand Canyon University.
Prior to Red Mountain Weight Loss, Monica has worked for Banner University Medical Center and St Joseph’s hospital specializing in the ER. She has also worked for Banner University Orthopedics and as a nursing educator for Pima Community College. She is a member of the American Association of Nurse Practitioners.
In her spare time she loves to travel, wine tasting, working out, and spending time with friends and family.

Linda Briggs headshot small

Linda Briggs, Aesthetic RN

Linda Briggs, Aesthetic RN

Linda Briggs is a Registered Nurse from Texas, and has recently moved to Tucson to join our Red Mountain Team! She has worked in several different areas of nursing throughout her career, but has continued to advance her training and education in Aesthetic Nursing for the last 7 years. She thrives on a healthy lifestyle and has a passion for making people look and feel their best. Outside of work, she enjoys spending time with her husband, family and working out daily.