Providers

Kerry Beasley, Au.D.

Kerry Beasley, AuD, is an experienced and licensed audiologist serving patients in and around Flagstaff, Arizona. Dr. Beasley joined the team at Flagstaff Surgical Associates in November 2016.

Originally from rural Missouri, Dr. Beasley earned her Bachelor of Science in health science from the University of Missouri-Columbia. She then went on to earn a Doctorate in Audiology from the University of California, San Diego and San Diego State University’s Joint Doctoral Program. Afterward, she completed a yearlong residency working as an audiology extern at Yale University in New Haven, Connecticut.

At Flagstaff Surgical Associates, Dr. Beasley performs comprehensive diagnostic audiology testing to patients across the entire age spectrum. Her rehabilitative treatment services include hearing aids, cochlear implants, and osseointegrated hearing systems for both children and adults with hearing loss.

She is currently accepting new patients. To schedule an appointment with Dr. Beasley, call the office or book a consultation online today.

Kai White, Au.D.

Alex D. Lund, DO

Alex Lund, DO, FAAOA, FACS, is a board-certified osteopathic physician specializing in ear, nose, and throat conditions, bringing extensive experience to Flagstaff Surgical Associates. Dr. Lund treats patients of all ages with conditions affecting the ears, nose, throat, head and neck in the Flagstaff, Arizona, community. He utilizes years of training in sinus surgery and otolaryngic allergy for his specialization in the treatment of allergies and sinus issues.

Dr. Lund was born and raised in Northern Utah and earned a Bachelor of Science in Clinical Laboratory Science at Weber State University and went on to complete medical school at Touro University Nevada College of Osteopathic Medicine in Las Vegas. He then finished his residency at the St. John Providence Health System through Michigan State University. Dr. Lund is board certified in Otolaryngology & Facial Plastic Surgery through the AOBOO-HNS. To further advance his training, Dr. Lund pursued his allergy fellowship with the American Academy of Otolaryngic Allergy (AAOA), and joined Flagstaff Surgical Associates in 2018.

He always focuses on treating more than just the condition at hand, striving for overall patient well-being. No matter the severity of the issue, Dr. Lund utilizes cutting-edge and minimally invasive procedure options that ensure enduring results.

Outside of his work as an ENT osteopath, Dr. Lund enjoys Northern Arizona sports and outdoor adventures with his wife and kids.

William J. Badger, MD

William J. Badger, MD, is a skilled urologist at Flagstaff Surgical Associates serving the Flagstaff, Arizona, community. His specialties include general urologic surgery, kidney cancer, vasectomy, and pediatric hernias and hydrocele.

Dr. Badger earned a Bachelor of Science in chemistry at Hobart and William Smith Colleges. Chemistry was fascinating, but he needed more personal interactions, and medicine seemed to be a great combination. After being accepted into medical school, he along with his future wife, Sarah, elected to defer medical school for a year to make sure that they were a good match for each other and that medicine was his ideal career. Fortunately, both medicine and Sarah have been great matches, and Hawaii was a pretty cool place to spend a year. They both became die-hard Buckeyes while Dr. Badger was in medical school at Ohio State University and Sarah was earning her degree in Occupational Therapy. After completing his residency in Urology at Albany Medical Center, he completed a Fellowship at the University of Iowa in Endourology, Laparoscopy, and Robotics.

Dr. Badger and his wife moved to Flagstaff, Arizona, in 2009 with their three awesome girls. They’ve found a great community here and love the many activities and adventures that Flagstaff and Northern Arizona have to offer. They have tried to add back to the community in many ways, not only by being a part of the fantastic medical community. They support their local public schools, which their children attend, as well as many local organizations and nonprofits. Dr. Badger sits on many committees at Flagstaff Medical Center, and he is Chairman of PathfinderHealth ACO, which is working to transform healthcare to deliver excellent medical care for all members of the community in a sustainable fashion.

As for Urology, Dr. Badger strives to provide excellent, compassionate, and state of the art care. He introduced robotic and laparoscopic renal and prostate surgery to Northern Arizona. He utilizes advanced technology when possible from electronic medical records to advanced imaging and in-office procedures. Dr. Badger treats all genders and ages for most urologic conditions.

What does Dr. Badger expect from his patients? The same that most providers want: knowledge of their health conditions and medications, a clear description of symptoms, and an attitude of ownership in their health.

Thanks for taking the time to read this. Dr. Badger looks forward to working together.

Kathleen M Olson, M.D.

Kathleen M Olson, MD, is an Arizona native who has come to Flagstaff, AZ to practice urology. She specializes in minimally invasive procedures and is notably one of the few urologists in the Southwest who perform Holmium Laser Enucleation of the Prostate (HoLEP) for BPH. She has trained extensively at Mayo Clinic in robotic surgery for cancer and reconstruction, and practices general and pediatric urology as well.

Dr. Olson grew up in Cave Creek, AZ, before moving to Minnesota to earn a Bachelor of Science in Biochemistry at the University of Minnesota. While she was a student, she conducted research in gene therapy and enzyme engineering, performed clinical research in a local trauma center, and volunteered at other local hospitals and hospice centers. Despite being busy pursuing her medical career, she managed to find time to learn badminton and the guitar, start a tap dance club and perform with a professional tap company, and spend a month in New Zealand clearing hiking paths and performing other ecology projects such as tagging birds.

She met her husband while at college in Minnesota, and they married soon after graduation. With the support of her husband, she applied to medical school while working at multiple local emergency rooms, and a year later they moved to Burlington, VT, where she attended medical school at the University of Vermont. Dr. Olson’s dream was to return to Arizona, and she completed her urology residency at Mayo Clinic Arizona where she received specialized training in HoLEP and minimally invasive robotic procedures. During medical school and residency, Dr. Olson performed research in multiple topics including opioid use after urologic procedures and alternatives for post-op pain management, urethral diverticula, bladder cancer, testicular cancer, HoLEP, and enhanced recovery after surgery. She has also authored a text-book chapter on upper tract urothelial cell carcinoma and published an article on urologic malignancies and Lynch Syndrome. Her professional passions include robotic surgery, HoLEP, advancing technology for better patient care, and providing excellent care for her patients. One of her biggest joys is having her patients tell her they have had improvement in their quality of life after treatment.

While in residency, Dr. Olson and her husband adopted two rescue dogs and welcomed their first child. She is overjoyed to join Flagstaff Surgical Associates and is excited to raise her family in Flagstaff and become involved in the community. Her hobbies include hiking, reading sci-fi/fantasy novels, quilting, Netflix marathons, and fly fishing.

Arianne Hyder, PA-C

Arianne Hyder is a physician assistant specializing in urology at Flagstaff Surgical Associates in Flagstaff, Arizona. She works together with the urologic team to provide compassionate, patient focused care to individuals of all ages.

Arianne grew up in Phoenix, Arizona. She attended Northern Arizona University in Flagstaff in to complete her Bachelor of Science in Biology with a minor in Chemistry in 2012. She then attended Northern Arizona University in Phoenix earning her Masters degree in Physician Assistant Studies in 2016.

After graduation, Arianne moved with her husband to Alaska where he was born and raised. She worked at Alaska Urology in Anchorage, Alaska, specializing in both adult and pediatric urology. In 2019, after the birth of their first son, Arianne and family decided to make the move back to Arizona, coming back to the beloved town of Flagstaff.

Arianne started with Flagstaff Surgical Associates in October 2019. She continues to treat both adult and pediatric populations but has a passion for treating incontinence and pediatric patients. Arianne is proficient at many urological procedures including urodynamics and Mona Lisa Touch laser therapy. She is a member of the American Urologic Association and the Urologic Association of Physician Assistants.

In her free time, Arianne enjoys spending time outdoors with her husband and two young boys. They enjoy hiking and traveling, and are on a mission to visit all 63 National Parks as a family.

Robert A. Berger, MD

Robert Berger, MD, FACS, is a highly skilled general surgeon bringing a number of specialties to Flagstaff Surgical Associates and its patients in the Flagstaff, Arizona, area. He focuses on general surgery as well as in surgeries associated with trauma, bariatrics (obesity), and laparoscopic surgery, a minimally invasive procedure used to examine organs in the abdomen. He also has a focus in robotics surgery, which allows for technically advanced and beneficial procedures.

Dr. Berger is proud to have started the Bariatric Surgery Center at Flagstaff Medical Center in 2004, where he now serves as the medical director. His dedication also aided the hospital in achieving recognition as a state-designated Level 1 Trauma Center. Dr. Berger currently serves as the assistant medical director of trauma services.

Dr. Berger received his medical degree from the University of Arizona College of Medicine in Tucson, where he also completed his internship in surgery and senior residency in general surgery. He finished his fellowship in laparoscopic at the University of Illinois Hospital in Chicago.

Dr. Berger is board-certified and a fellow of the American College of Surgeons. He is passionate about his involvement on a number of boards, committees, and the opportunities he’s had as a speaker and writer published in various medical journals and beyond.

Dr. Berger is continually advancing surgery options and procedures in his various fields of interest, always focusing on patient comfort through their journey.

When Dr. Berger is not caring for patients at Flagstaff Surgical Associates, he spends time with his wife and children enjoying the Arizona outdoors.

Weight Management Clinic | Northern Arizona Healthcare

Kate E. Preston, MD

Kate Preston, MD, FACS, has been a surgeon with Flagstaff Surgical Associates since 2016. Serving all ages and genders in the Flagstaff, Arizona, community, she brings her expertise in general surgery as well as breast, pediatric, and laparoscopic surgery to the practice.

Dr. Preston completed medical school at Louisiana State University in New Orleans and went on to finish her residency at the Phoenix Integrated Surgical Residency Program in Arizona. Dr. Preston gained superb experience and training in general surgery during residency, which offered experience in a Level I Trauma Center. Dr. Preston is a board-certified general and breast surgeon and a fellow of the American College of Surgeons.

Dr. Preston’s passion for patient care combined with her accomplished training makes for effective patient experiences in breast surgeries, and beyond. She focuses on the total well-being of patients in their surgery journey, opting for minimally invasive procedures, high-tech options, and clear levels of communication. Although she has a particular interest in treating breast issues, she serves those with a spectrum of surgical needs when they seek treatment at Flagstaff Surgical Associates.

Sarah Sohail, M.D.

Sarah Sohail, MD is a board certified general surgeon bringing her expertise to Flagstaff Surgical Associates. She has completed additional training in minimally invasive and bariatric surgery with a special interest in robotic assisted surgeries.

Prior to moving to Flagstaff, she completed her surgical residency at the University of Arizona in Tucson. She then did a year of Fellowship training in Advanced Gastrointestinal Surgery at Banner Gateway Medical Center in Gilbert, AZ. During her fellowship year she developed a passion for fighting obesity and helping patients achieve healthier lifestyles and weight loss through bariatric surgery. Her other interests include management of GERD, hernia surgery, and nonsurgical weight loss options.

She spends her free time exploring the trails with her dog Piper, tending to her house plants, reading a good book, and cooking with friends. She’s always looking for new food recommendations- whether it be local restaurants, fresh recipes, or international travel to try new delicacies.

Erin M Enlow, PA-C

Erin Enlow, PA-C graduated from College of Holy Cross in Worcester, Massachusetts with a B.A. in Political Science and served four years in the United States Navy after graduation. She then pursued her goal of entering the medical field by graduating in 2010 from Arizona School of Health Sciences (A.T. Still University) with a Master’s degree in Physician Assistant Studies.

Erin has worked in general and bariatric surgery since graduation, but has clinical experience in family/internal medicine and wound care as well. She works in both clinic and hospital settings directly with patients to help determine a plan of care, either before or after surgery. She enjoys caring for patients and working in such a diverse field of medicine.

As a Physician Assistant, she is a member of a comprehensive healthcare team and cares for patients in collaboration with the patient’s surgeon.

Karole Davis, M.D.

Karole Davis, MD completed her medical residency with the Maricopa Integrated Health Systems in Phoenix, AZ and her fellowship in Surgical Critical Care, Trauma and Acute Care Surgery at Vanderbilt University Medical Center in Nashville, TN. Since completing her training in 2013, she has with Maricopa Integrated Health System and Creighton University as a Trauma/Critical Care Surgeon, and also as the Associate Program Director for the General Surgery Residency Program.

Dr. Davis will join all of our general/trauma surgeons in continuing to work with 3rd and 4th year surgical residents from the University of Arizona, as well as medical and physician assistant students that come through Flagstaff Medical Center as a part of their training.

Her hobbies include scuba diving, hiking, travel, sports, reading and working on her Spanish ability. She enjoys spending time with her husband and daughter.

Brett Dempsey, M.D.

Brett Dempsey MD FACS works as an acute care surgeon covering trauma, emergency general surgery, and surgical critical care. He graduated from the University of Illinois College of Medicine and completed his general surgery residency at the Mayo Clinic in Rochester, Minnesota. He has worked as a general surgeon in southern Illinois as well as Bangladesh and Togo West Africa. Dr. Dempsey then returned to the United States and completed a Surgical Critical Care Fellowship at the University of Missouri.

Dr. Dempsey has an interest in emergency general surgery as well as global surgery. His four years in Bangladesh and year in Togo have greatly shaped his life and career. He always enjoys talking about his overseas experiences.

In Northern Arizona, Dr. Dempsey covers call at both Flagstaff Medical Center and Tuba City Regional Healthcare Corporation. He enjoys teaching surgical residents at both locations.

Outside of medicine, Dr. Dempsey enjoys many outdoor activities in Flagstaff with his wife and seven children. He also enjoys running with his dog and sampling international food.

Ralph Zane Kelley, DO

Dr. Kelley is originally from a small town in Southern Illinois called Nashville, near St Louis. He received his bachelor’s degree from the University of Illinois, Urbana-Champaign in 1997. Dr. Kelley attended medical school at Kansas City University. After completing an internship at University Hospital St. John Medical Center in Westlake, Ohio, he completed a General Surgery Residency at the University of Pittsburgh Medical Center-Horizon. Dr. Kelley then completed his Surgical Critical Care and Acute Care Surgery Fellowship at the University of Nevada, University Medical Center in Las Vegas in 2011.

Dr. Kelley has worked as an Acute Care Surgeon at Flagstaff Medical Center since 2011 while simultaneously working at Tuba City Regional HealthCare Corporation where he still serves as Trauma Medical Director. As a Native American, Dr Kelley’s Indian Health Service Scholarship commitment brought him to Northern Arizona and he has never looked back. Trauma systems and centers on the Reservation are Dr. Kelley’s passions. Dr. Kelley is board-certified in both general surgery and surgical critical care.

Dr. Kelley (Zane) lives in Flagstaff with his wife Megan who is an artist. His hobbies include hunting, fishing, cabinet making, writing, and spending time with his wife and their 2 dogs. Dr. Kelley is a Fellow in the American College of Osteopathic Surgeons and the American College of Surgeons.

Rodney A. Engel, M.D.

Rodney Engel, MD serves as a general gastroenterologist taking care of specialty diseases of the GI tract, liver, biliary tree and pancreas. He has been a local stalwart in Flagstaff since 2013 prior to joining the team at Flagstaff Surgical Associates. Dr. Engel’s goal is to provide compassionate, contemporary, comprehensive care to his patients. He strives to provide clear communication combined with appropriate care in clinic. He seeks to provide the most effective, efficient and comfortable procedure possible with his endoscopies.

Dr. Engel has many years of experience taking care of the GI issues of Northern Arizona. He has experience with colonoscopy, esophagogastroduodenoscopy (EGD or upper endoscopy), endoscopic retrograde cholangiopancreatography (ERCP), Bravo pH monitoring, variceal banding, esophageal manometry/motility, capsule endoscopy and other endoscopic interventions. He has many years in management of chronic and complex GI disorders including inflammatory bowel disease, liver cirrhosis, GI cancers and many other issues. Dr. Engel is fluent in Spanish and hopes to continue to serve those patients as well.

Dr. Engel grew up in Mesa, Arizona on the family citrus farm. After graduating in the top 1% of his class in high school, Dr. Engel attended Pomona College in California. In college he majored in Religious Studies while also pursuing his medical school prerequisites. He was the only student asked to be both a Writing tutor and a tutor for Organic Chemistry. After his experience in California he attended medical school at Albert Einstein College of Medicine in the Bronx, New York. He met his wife there and she accompanied him to Mayo Clinic where he did his internal medicine training. Returning to Arizona was a great fit for Dr. Engel and he pursued his academic interests at Mayo Clinic first as Chief Internal Medicine Resident and then on faculty in Internal Medicine. However his passion remained pursuing Gastroenterology training. He chose to remain in the Southwest and completed his GI fellowship at the University of New Mexico in Albuquerque. Dr. Engel is a member of the American Board of Internal Medicine certified in both Internal Medicine and Gastroenterology. He is a member of the American College of Gastroenterology.

Dr. Engel returned to Arizona in 2013 and is proud to call Flagstaff his home. His wife works as a Physician Assistant in orthopaedics. He has two daughters who take up much of his time. He loves the Southwest and spends much of his free time outdoors, particularly hiking, mountain biking and skiing. With vacation he loves to travel particularly exploring new areas by bicycle. If time allows he likes reading si-fi/fantasy novels or watching movies with his family. Dr. Engel is thrilled to base his family in a town that fits his love of diversity, education, STEM and the outdoors.

Melissa Hakes, FNP

Melissa is a Family Nurse Practitioner (FNP) specializing in Gastroenterology and Liver disease. She earned a Master of Science in Nursing from Georgetown University and a Bachelor of Science in Nursing from Northern Arizona University. Melissa was raised in Flagstaff and is a proud alumnus of Flagstaff High School (Go Eagles). She gained valuable experience caring for our local community in multiple settings, including primary care, acute care, surgical care, and home health, before advancing to her current role where she works alongside our exceptional gastrointestinal team to deliver comprehensive, patient-centered care.

When not caring for patients, Melissa enjoys spending time with her family, being outdoors, reading, traveling, and sipping iced Matcha. Her mission is to empower patients with the knowledge and tools they need to achieve optimal health and wellbeing.