Our Doctors

Robert Byron Osborne, M.D.

Dr. Byron Osborne joined the Urological Associates, Ltd. in July 1990. He received his medical degree from the Medical College of Virginia, where he also continued his surgical and urological training. He was certified in 1992 by the American Board of Urology and recertified in 2002.

Dr. Osborne is an avid golfer. He and his family reside in Keswick.

Julian C. Fagerli, M.D.

Dr. Julian Fagerli joined the practice in July 2000. Dr. Fagerli, "Corky", is a graduate of James Madison University in Harrisonburg. He received his medical degree from Eastern Virginia Medical School in Norfolk. He received general surgery training at West Virginia University School of Medicine, followed by four years of residency with the Department of Urology at the University of Pittsburgh Medical Center. Dr. Fagerli is a Board Certified urologist.

Corky enjoys playing golf and spending time with his two beautiful daughters. Dr. Fagerli, his wife, Nicole, and their daughters, Anna and Caroline, make their home in Western Albemarle County.

Mark Passarella, M.D.

In July 2003, the group welcomed the addition of Dr. Mark Passarella, a 1992 graduate of the University of Virginia. Dr. Passarella received a Master's degree in Physiology and Biophysics, as well as his medical degree from Georgetown University.

He continued his surgical and urological training at Tulane University School of Medicine in New Orleans. Dr. Passarella received extensive laparoscopic training from one of the leading physicians in the field at Tulane University. He was certified by the American Board of Urology in 2005.

Dr. Passarella, his wife, Lisa, son, Bradley, and daughter, Elizabeth, make their home in Charlottesville.

Claiborne Whitworth, IV, M.D.

Dr. Claiborne "Chip" Whitworth, IV joined Urological Associates, Ltd. on August 1, 2004. Chip is a native of Charlottesville and a graduate of the University of Virginia. He also received his medical degree from the University of Virginia Medical School. He went on to Richmond, Virginia where he attended the Medical College of Virginia.

After completing his urology training in 1996, Dr. Whitworth set up practice in rural Galax, Virginia. Dr. Whitworth was certified by the American Board of Urology in 1998.

He and his family make their home in Western Albemarle County.

Jonathan A. Israel, M.D.

Dr. Jonathan Israel is a Virginia native who joined Urological Associates, Ltd. in August 2017. He received his medical degree from the University of Virginia.  He graduated, with distinction, from the University of Virginia College of Arts and Sciences with a Degree in Biology.  Dr. Israel completed his surgical and urological training in New Orleans, Louisiana, at the Ochsner Medical Center and the LSU Department of Urology.  His clinical practice includes all areas of general urology with special interest in voiding dysfunction, minimally invasive treatments of BPH, and all aspects of endourology.

Dr. Israel is an avid runner, Wahoo fan and currently resides in Charlottesville.

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