Dr. Brian DeCastro is a highly skilled urologist who works in the newly renovated Fauquier Health Medical Center on Fauquier Hospital’s campus in Warrenton, Virginia. Dr. DeCastro is board certified in urology and prides himself on his patient-centered approach to medicine. He finds treatment of urologic cancers, kidney stones and incontinence to be very rewarding, but what he enjoys more than anything is improving his patients’ overall quality of life.

Appointments may be made by calling (540) 316-5940.

Medical Team

Dr. Brian DeCastro

Dr. Brian DeCastro is a skilled urologist, equipped with a patient care philosophy of “the patient comes first”. While he enjoys all aspects of urology, Dr. DeCastro is particularly interested in the prevention and management of kidney stones, advancements in testosterone replacement and any area that allows him to improve his patients’ quality of life. As a former Army service member, Dr. DeCastro understands the importance of a supportive community and brings a level of warmth and professionalism to every procedure he is a part of—ensuring the highest level of support in our own community.

Education and Training

After earning his Doctor of Medicine degree from SUNY Upstate Medical University in 2002, Dr. DeCastro completed his internship and residency program in general surgery and urology at Madigan Army Medical Center in Tacoma, Washington. Dr. DeCastro served as Chief of Urology at Winn Army Community Hospital in Fort Stewart Georgia for the past five years. He is board certified in urology.

Honors and Awards

During Dr. DeCastro’s tenure in the Army, he received the Patient Safety Award, as well as the Army Commendation Medal from Madigan Army Medical Center. He was also named Preceptor of the Year by the Interservice Physician Assistant Program. Dr. DeCastro is a member of the American Urologic Association, Society of Governmental Urologists, Southeastern Section of the American Urologic Association and the Georgia Urologic Association.


Dr. DeCastro completed a variety of research presentations and projects during his medical training that included topics related to prostate cancer, cystoscopy, urethral strictures, testicular microlithiasis, erectile dysfunction, and gross and microscopic hematuria.

Personal Interests

Dr. DeCastro enjoys spending time with his family, watching sports – he is a huge Seahawks and Syracuse fan — vegetable gardening (especially aquaponics) and cooking. He also loves trying new restaurants with his wife.

Dr. Kathryn Sullivan

As a major in the United States Air Force, Dr. Sullivan was a caring and compassionate physician for active duty military and their dependents.  While many people think of urologists as only treating men, she clarifies, “Women, like men, can have kidney stones, bladder cancer, kidney cancer, and incontinence.”  Dr. Sullivan focuses on providing excellent, patient-centered care, every day.

Education and Training

After earning her Doctor of Medicine degree from the George Washington School of Medicine in 2005, Dr. Sullivan completed the University of Colorado Hospital Internship and Residency Program.  She served as the Chief of Urology at Travis Air Force Base in California for three years. She is board certified in Urology.

Research and Presentations

Dr. Sullivan conducted a variety of research projects and presentations during her medical training, including topics related to prostate cancer, vasectomy, and other urological procedures.  She was a manager of a skills verification program that ensured urologists were current on issues in urology and surgical techniques.

Our Services

  • Bladder Cancer
  • Bladder Sling Surgery
  • Cystoscopy
  • Erectile Dysfunction
  • Hematuria/Blood in Urine
  • Incontinence
  • Incontinence/Overactive Bladder
  • Kidney Stones/Lithotripsy
  • Lithotripsy
  • Low Testosterone/Testosterone Replacement
  • Male Infertility
  • Pelvic Floor Disorder
  • Prostate/PSA Disorders           
  • Prostate Cancer
  • Testicluar Cancer/Testicular Pain
  • Vasectomy
  • Vasectomy Reversal

Hours of Operation

  • Monday – Friday, 8 a.m. – 4:30 p.m.

Location and Contact

550 Hospital Dr.
Warrenton, VA 20186
(540) 316-5940