Dr. Jim Clark

Anderson Medical Center, Boulder, Co

Buffalo Ridge Medical Center, Broomfield, Co

A practicing urologist for over 25 years, Dr. Clark has maintained an up-to-date approach to urologic care. His areas of expertise include: cancers of the genitourinary tract (bladder, kidney, prostate, etc), urinary stone disease (kidney, ureter, bladder), neuromodulation (implanting nerve stimulators for bladder dysfunction), and the newest laser techniques for prostate conditions. He is a member of the Boulder Community Hospital Tumor Board and stays active in out-reach programs to keep the community informed on the latest methods of laparoscopic surgery (robotic surgery). In addition, Dr. Clark has proctored many doctors and enjoys educating patients and colleagues about urological care.

Dr. Sam Melouk

Anderson Medical Center, Boulder, Co

Avista One Medical Plaza, Louisville, CO

Dr. Melouk has been proudly providing state-of-the-art urologic care to the Greater Boulder County area since joining Alpine Urology in 1998. He maintains a general urology practice with areas of expertise that include urinary tract cancers, robotic surgery, urinary incontinence and pelvic prolapse, urinary tract stone disease, and prostate disorders. He has spent countless hours attending various workshops, courses, seminars, and meetings so that he may provide his patients the newest and most advanced treatments available in the field of urology.

Dr. Cragin Anderson

Avista One Medical Plaza, Louisville, CO

After working as a mechanical engineer, Dr. Anderson trained at Emory in Atlanta, GA and began practicing urology in 1997. He is a fellow of the American College of Surgeons. He is a member of the American Urologic Association, as well as local and regional urologic societies. He practices primarily in the Alpine Urology Avista Hospital office. His practice interests include needleless vasectomy, male prostate health and minimally invasive treatments of prostate enlargement, kidney stone treatment and prevention, female pelvic prolapse and stress urinary incontinence, sexual dysfunction, as well as surgical and radiation treatment for prostate cancer.

Dr. John Kefer

Lafayette Office, Lafayette, Co

St. Anthony North Health Campus, Westminster, CO

Dr. Kefer is a board-certified urologist who joined our practice from the Cleveland Clinic, the world's most specialized urology program. He is a member of the American Urologic Association, and is Co-director of Urological Robotic Surgery at Exempla Good Samaritan Medical Center, His practice interests include single-site scalpeless vasectomies, treatment and prevention of kidney stones, minimally-invasive treatment of kidney cancer, urinary incontinence in women and men, prostate enlargement/ prostate health, sexual dysfunction, surgical and non-surgical prostate cancer treatment, and male fertility.

Dr. Chris Webster

Longmont United Medical Building, Longmont, CO

St. Anthony North Health Campus, Westminster, CO

Dr. Webster was born and raised in Tampa, Florida. He completed a Bachelor's degree at the University of Florida before returning to Tampa for his medical training. He completed medical school, surgical internship and urology residency training at the University of South Florida and H. Lee Moffitt Cancer Center and Research Institute.

After working for 5 years in private practice in Orlando, Dr. Webster decided to pursue his dream of living in the Colorado.

Dr. Webster is trained in laparascopic, robotic, cryosurgery, and laser surgery techniques. He practices all aspects of adult urology for both men and women but has particular interests in minimally invasive procedures for prostate and kidney disorders, women's urinary incontinence and pelvic floor prolapse, and prostate diseases.

When not working with patients, Dr. Webster enjoys spending time with his wife and two daughters, running, snow skiing, and traveling. He is a member of the American Urological Association and a Fellow of the American College of Surgeons. Dr. Webster is a Board Certified Urologist.

Katherine Olson PA-C, MMS

Anderson Medical Center, Boulder, Co

Katherine is a board certified Physician Assistant. Originally from Wisconsin, she has called Colorado home since 2006. After completing her undergraduate degree in the History of Science from the University of Wisconsin, she went on to become a certified Physician Assistant at the Red Rocks Physician Assistant Program. She received further training at St. Francis University, where she obtained her Masters of Medical Science.

She joined Alpine Urology as a Physician Assistant in early 2012.


Physician Assistants, also known as PAs, are highly trained health care professionals licensed to practice medicine. PAs conduct physical exams, diagnose and treat illnesses, order and interpret tests, counsel on preventive health care, write prescriptions and assist in surgery.

Because of the close working relationship the PAs have with physicians, PAs are educated in the medical model designed to complement physician training. Upon graduation, physician assistants take a national certification examination developed by the National Commission on Certification of PAs in conjunction with the National Board of Medical Examiners. To maintain their national certification, PAs must log 100 hours of continuing medical education every two years and sit for a re-certification national exam every ten years.