Meet Our Urologists | Leaders in Prostate Cancer Detection and Treatment

Our prostate cancer doctors at USMD Prostate Cancer Center are among some of the most experienced in the world. Practicing from our Arlington, Dallas Fort Worth, and Irving Texas Centers, we have performed over 4,500 robotic surgeries. We are also home to one of the world's largest, most experienced cryotherapy programs. Radiation therapy treatments at USMD Prostate Cancer Center are on the leading-edge of radiosurgery techniques, with our radiation oncologist regarded as one of the top robotic radiosurgeons in the country.

Our Urologists

Harrison Mitchell Abrahams, M.D. Harrison Mitchell Abrahams, M.D.

Dr. Abrahams has undergone extensive training and practical use of the Da Vinci surgical robot for urological procedures. Dr. Abrahams is a member of the American Urological Association, American Society of Clinical Urologists, Endourological Society.
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David L. Shepherd, M.D. David L. Shepherd, M.D.

Dr. Shepherd is experienced
with the treatment of all urologic cancers with particular interests in nerve - sparing radical prostatectomy, partial nephrectomy and continent urinary diversions.
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Rich Bevan-Thomas, M.D. Rich Bevan-Thomas, M.D.

Dr. Bevan-Thomas, a board-certified urologist, has been performing robot-assisted surgery procedures since 2002.
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Scott A. Thurman, M.D. Scott A. Thurman, M.D.
(Fort Worth)

Dr. Thurman is a member of AOA Honor Medical Society, the American Urological Association and the American Medical Association. He has a special interest in laparoscopy and robotic prostatectomy.
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John M. House, M.D.

John M. House, M.D.

Dr. House has practiced General Urology for more than 20 years and is Chairman of the Board and founder of USMD, Inc.
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Clif Vestal, M.D.

Clif Vestal, M.D.

Dr. Vestal has experience with all types of cancer therapies, including laparoscopic cryosurgery of kidney and prostate cancers as well as brachytherapy of the prostate.
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Peter LaNasa, M.D. Peter LaNasa, M.D.

Dr. LaNasa is specialized in using the Novalis Tx™ Surgical System: a remarkable technology that offers a virtually painless and 100% non-invasive alternative to surgery.
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Keith A. Waguespack, M.D. Keith A. Waguespack, M.D.
(Las Colinas)

Dr. Waguespack has special training in laparoscopic urological surgery, including the use of the da Vinci Surgical Robot System.
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Justin T. Lee, M.D. Justin T. Lee, M.D.

Dr. Lee is a specialist in robotic prostate surgery using the da Vinci Robotic Surgical System. He has undergone extensive training for robot-assisted prostatectomies under the direction of innovators of the procedure.
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Our Oncologists

C.K. Wang, M.D. C.K. Wang, M.D.

Dr. Wang is board certified in internal medicine, hematology and oncology. He practiced oncology in North Texas for 5 years before joining Urology Associates of North Texas in 2012.
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Revathi Angitapalli M.D.

Revathi Angitapalli M.D.

Dr. Angitapalli completed her fellowship in Hematology / Oncology at Roswell Park Cancer Institute, Buffalo, NY, and was a Visiting Associate Physician at Rockefeller University, New York, NY.
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Our Physician Assistant and Family Nurse Practitioner

Alanna Allen, PA-C Alanna Allen, PA-C

I moved to Dallas for a One-Year PA Fellowship in Urology at UTSW Medical Center in 2012 and am a member of the American Academy of Physician Assistants and the Texas Academy of Physician Assistants. I seek to collaborate with my patients to ensure they feel empowered in their treatment decisions. The majority of my family still lives in Iowa and I am the oldest of five children. I am a member of The Church of Jesus Christ of Latter Day Saints and enjoy dancing, singing, and frisbee in my free time.
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Shabbir Ahmad, FNP-C

I love working as a nurse practitioner in oncology and urology. I enjoy helping patients understand their treatment options and working with them to make informed healthcare decisions. I was born and raised in Pakistan. I also practiced medicine as an M.D. there for more than 10 years. Prior to becoming a nurse practitioner at USMD, I worked as an RN at USMD Hospital at Arlington for six years. I live in Arlington with my wife and four children. I enjoy spending time with my family, shopping with my children and trying new restaurants.
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