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.
Flagstaff Surgical Associates would like to share that Dr. Jon Rumohr has concluded his practice with our group as of August 29, 2025.
It has been an honor to have Dr. Rumohr as part of our team, and we sincerely thank him for his years of dedicated service and compassionate care to our patients and community.
Our urology team at Flagstaff Surgical Associates will continue to provide the same high-quality, patient-centered care that our patients have come to know and trust. If you have any questions about your ongoing care, test results, or future appointments, please don’t hesitate to contact our office for assistance.
We wish Dr. Rumohr all the best in his future endeavors and thank our patients for their continued trust in our team.
Flagstaff Surgical Associates, P.A.
Jon A. Rumohr, MD
Jon Rumohr, MD, brings years of experience and training as a urologist to Flagstaff Surgical Associates in Flagstaff, Arizona. He serves all ages, genders, and urological conditions and utilizes the most state-of-the-art care. His specialties are in general urology, prostate cancer, kidney stones, and benign prostate hyperplasia.
Dr. Rumohr grew up in rural Michigan and went on to complete medical school at the University of Michigan in Ann Arbor. He finished his residency at Vanderbilt University Medical Center in Nashville, Tennessee, and his fellowship at Baylor College of Medicine in Houston, Texas.
Dr. Rumohr became passionate about men’s health during his fellowship and focused on innovative, minimally invasive vasectomy techniques, and microscopic vasectomy reversal. He studied the treatment of erectile dysfunction, urinary stones (kidney stones), urinary incontinence, male infertility, and testosterone replacement therapy. He also focused on office therapy procedures for prostate enlargement and general urology.
Also during Dr. Rumohr’s many years in Houston, Texas, he developed skills in minimally invasive da Vinci® robotic surgery for cancer of the kidney and prostate. This allows for high-tech instruments in surgical procedures and ultimate precision for the surgeon. Dr. Rumohr went on to train resident surgeons in the program and now shares this expertise with Flagstaff Surgical Associates.
Dr. Rumohr, his wife, and two daughters enjoy living in Flagstaff, Arizona. They spend time outdoors and skiing. His wife is a practicing dermatologist at Northern Arizona Dermatology, and they are thrilled to be involved in the community.
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.
Christopher Gomez, NP
Christopher Gomez, NP, is a nurse practitioner at Flagstaff Surgical Associates in Flagstaff, Arizona. Christopher works closely with a compassionate team to deliver exceptional patient care for families and individuals of all ages.
Christopher is a long-time resident of Flagstaff, and has lived in the community since 2003. He earned his bachelor’s degree in nursing from Northern Arizona University in 2010. Following his studies, he went on to pursue his master’s degree in nursing at Vanderbilt University in Nashville, Tennessee, in 2022.
He is certified by the American Academy of Nurse Practitioners and the American Nurses Credentialing Center.
In his free time, Christopher enjoys outdoor activities such as exploring Flagstaff, running, gardening, and doing yoga. He also loves food and cooking his favorite meals at home.
As a nurse practitioner specializing in urology, Christopher is dedicated to helping you through your health issues and finding a path back to a healthier life.