Oregon Urology Institute

Center Information

Stephanie Kerns
Research Manager
Oregon Urology Institute
2400 Hartman Lane
Springfield, OR 97477

Currently Enrolling Trials

[Show More]

Therapeutic Areas



Established in 1929, Oregon Urology Institute is the oldest urologic practice between Portland and San Francisco. Today our group consists of 14 board-certified urologists, a Urogynecolgist, Radiation Oncologist as well as a 6 Physicians Assistants. The main clinic is located in Springfield, OR, with satellite clinics in the towns of Florence & Roseburg. Our primary objective is to offer the finest urologic care for our adult and pediatric patients, and to give our patients access to the latest pharmaceutical developments through participation in clinical trials.


We have been conducting Phase II-IV trials for more than 25 years in the following therapeutic areas:

  • Prostate Cancer
  • Bladder Cancer
  • Renal Cell Carcinoma
  • High-Grade PIN
  • Prostate Cancer Prevention
  • Benign Prostatic Hyperplasia (BPH)
  • Acute Urinary Retention
  • Stress Urinary Incontinence
  • Urge Urinary Incontinence
  • Nocturia
  • Pediatric Enuresis
  • Urinary Tract Infections
  • Erectile Dysfunction
  • Genetic Studies
  • Chronic Prostatitis
  • Immunotherapy
  • Chemo Therapy


Our 34,000 square-foot facility is not only home to our Research Department, it’s our Doctors main private practice. Our facility also houses our out patient surgery center, physical therapy, CT and X-ray center as well as a LabCorp drawing facility.

Our leading-edge Radiation Center is one of the most advanced in the Northwest, giving our doctors unmatched ability to treat cancers and other tough ailments and diseases.

Apheresis Center

Infusion Center


Dawn Bodell, FACOS


Dr. Bodell earned her medical degree from the Kirksville College of Osteopathic Medicine, and completed her residency in urology at the Michigan State University consortium in Detroit. She then completed her fellowship female urology and pelvic reconstruction at the Tower Institute in Los Angeles. She directs the practices Continence Center and Urodynamics Laboratory.

Mark Carson, MD, PhD


Honored for academic and professional excellence throughout his training and career, Dr. Mark Carson is a multi-talented physician and surgeon with expertise in molecular biology, biophysics, and physiology. This background has been instrumental in improving quality of life for his patients by educating patients about their condition and counseling them regarding medical and surgical options for their care.

Connie DiMarco, MD


Dr. DiMarco is an honor society physician specializing in female urology. Her ongoing research in pelvic floor dysfunction, vaginal reconstruction, pelvic organ prolapse, and urogynecological fistulas gives her useful insight into successful treatment and care. Even after a prestigious fellowship at the Mayo Graduate School of Medicine, Dr. DiMarco is still duly impressed with the caliber of expertise and leading edge standards here at Oregon Urology Institute.

David DiMarco, MD


Trained in an era when robotic surgery began reinventing major urological treatments, Dr. David DiMarco quickly became a valuable and accomplished specialist in this field. He has since published a vast array of medical papers on the topic, as well as presented to dozens of medical societies, key conferences, and medical schools.

David Esrig, MD, FACS


A prestigious urologic oncology fellowship at the University of Southern California launched Dr. David Esrig's decorated career specializing in cancer of the prostate, kidney, testis, and bladder. He served as director of urologic oncology at Yale University and has published numerous articles and book chapters covering this area of specialty.

Douglas Hoff, MD


Dr. Hoff joined the practice in 2004. After graduating from the University of Missouri School of Medicine and completing his urology residency at the University of Wisconsin, Dr. Hoff was the Chief Staff Urologist at the Nellis Air Force base in Las Vegas Nevada. Dr. Hoff has expertise in laparoscopic and minimally invasive surgery as well as cryosurgery.

Thomas Kollmorgen, MD, FACS


Mayo Clinic-trained in surgery and urology, Dr. Thomas Kollmorgen brings leading-edge expertise and proficiency to Oregon Urology Institute and an exceptional level of care. His reputation is widely known through his published works, presentations, and patient successes.

Roger McKimmy, MD


Dr. McKimmy came to Oregon Urology Specialists in 1994. He was a practicing pharmacist before graduating from Oregon Health Sciences University. He received his surgery and urology training at Albany Medical College in New York. Dr. McKimmy has special interest in pediatrics, incontinence and endourology. Dr. McKimmy also served as the 2006 President of the Lane County Medical Society.

Brady Walker, MD


After graduating with honors from OHSU and Pacific University, Dr. Brady Walker trained in surgery and general urology at University of Utah. His ongoing research in groundbreaking urological treatments and successful treatments in minimally invasive surgery, pediatrics, and oncology earned him the position of chief of surgery at McKenzie-Willamette Medical Center - a position he shares alongside his private practice at Oregon Urology Institute.

Jeffrey Woolsey, MD


After winning three prestigious research fellowships in Iowa and Oregon, expertise that gave him valuable insight into leading urologic health treatment, Dr. Jeffrey Woolsey went on to earn his medical degree from the University of Iowa College of Medicine. A prominent residency at the University of Virginia furthered his training in one of his areas of specialty: robotic surgery.

Genoa Ferguson, MD

Dr. Ferguson graduated from medical school at the top-ranked Washington University in St. Louis and then stayed to train in urologic surgery and continue her research. During her residency, she was able to present her work over 20 times both nationally and internationally, publish a book chapter, and author over a dozen journal articles. Besides making significant contributions to urologic research, she was also able to hone her surgical skills and was well known for the excellent care she took of patients and her emphasis on quality of life. She now practices general urology with an interest in female urology, urologic incontinence, vasectomies, stone disease, and erectile dysfunction.

Chad Jorgensen, PA-C

Chad began his career as a registered nurse in 1997, specializing in operating room nursing. He became a registered nurse first assistant in 2000. Most recently he completed his training as a physician assistant at Medex Northwest, a division of the University of Washington School of Medicine. He assists in all aspects of our office and hospital practice.

Angela Watson, PA-C

Angela graduated from Duke University's Physician Assistant Program. With her previous experience in neurosurgery, orthopedics, radiology, physical therapy and sports medicine, Angela has a broad spectrum of expertise that she has carried into urology. Angela uses a patient care philosophy of being a partner with each patient in their care to be certain that their quality of life goals are met.

Joseph Harp, PA-C

After serving in the Army for six years as a Medical Specialist with an Emergency Medicine background, Joe went on to school to pursue Physician Assistant Studies. He obtained his degree at MEDEX Northwest Division of Physician Assistant Studies, at the University of Washington, School of Medicine. He enjoys working closely with his patients, with the philosophy that the patient comes first and should be at the forefront of their healthcare decisions, with all options available. He is a native Oregonian.

Lisa Olson, PA-C

In 2004, Lisa completed her training at Pacific University School of Physician Assistant Studies as a graduate with distinction. Her experience in various aspects of medicine make her a valuable member of the Oregon Urology Institute team. She also has a special interest in nutrition and enjoys counseling patients on strategies to optimize general and urologic health.

Lisa Stevens, PA-C

Lisa worked at the American Red Cross in Minneapolis before receiving her Master’s degree in Physician Assistant Studies from the University of Wisconsin-La Crosse. Her training took place at the prestigious Mayo Clinic in Rochester, Minnesota. Lisa is dedicated to providing quality patient care and promoting patient education regarding their urologic conditions.

Kevin Brandt, PA-C


Bryan Mehlhaff, MD

Research Medical Director


An award-winning scholar and medical student while training at New York's Albany Medical Center Hospital, Dr. Mehlhaff has maintained his drive for excellence throughout his career. He honed his skills in adult and pediatric urology, endourology, and minimally invasive surgery as an assistant urology professor before entering private practice at Oregon Urology Institute. Dr. Mehlhaff continues to be at the forefront of education by serving on multiple urologic medical advisory boards, a Board member of the Large Urology Practice Association as well as serving as Research Medical Director at the Institute. Dr. Mehlhaff has an active and ongoing interest in the latest therapeutics in advanced prostate cancer.


Our main clinic is centrally located in the western corridor of the state servicing Bend, Florence, Eugene, Roseburg & Salem.


We have the flexibility of using a central IRB or our local community IRB.

Contact Center

If you are interested in contacting this center to discuss clinical trials, please complete and send the email form below. A representative from the research center will then follow up with you.