Urology Associates Oklahoma City

Urology Associates, Inc.

Call Us Today! 405.749.9655

TOLL FREE 866.246.8911
11000 Hefner Pointe Dr. Oklahoma City, OK 73120

Urology Associates Oklahoma City

Meet The Doctors

Daniel Barnes, M.D.

Daniel Barnes MD - Urology AssociatesDr. Barnes earned his medical degree from the University of Oklahoma. After completing his residency training at Oklahoma Teaching Hospitals, he joined Urology Associates in 1988. Dr. Barnes is certified by the American Board of Urology.


Barbara Voss-Alvarez, M.D.

Barbara Voss Alvarez MDDr. Voss-Alvarez received her Masters of Biology Education from Central State University (now University of Central Oklahoma), followed by her Doctor of Medicine from the University of Oklahoma. During her residency at Oklahoma Teaching Hospitals, she completed a Fellowship in Renal Transplant at Baptist Medical Center. Dr. Voss-Alvarez joined Urology Associates in 1991, and serves as Laboratory Director for the facility in addition to her urology practice. She is certified by the American Board of Urology.


J. Samuel Little, Jr., M.D.

J. Samuel Little Jr MDAfter attending the University of Oklahoma for his undergraduate studies, Dr. Little earned his medical degree from Washington University in St. Louis, Missouri. After completing his residency at Indiana University, Dr. Little served as an Assistant Professor in the university's Department of Urology. Dr. Little returned to Oklahoma and joined Urology Associates in 1995. He is certified by the American Board of Urology. In addition to his busy practice at our Oklahoma City location, Dr. Little maintains a weekly clinic in El Reno, and a bi-weekly clinic in Weatherford. An avid OU football fan, Dr. Little and his wife, Michelle, have three daughters.


D. Glen Coles, M.D.

D. Glen Coles MD - Urology Associates Oklahoma CityDr. Coles received both his undergraduate degree and his Doctor of Medicine from the University of Illinois Urbana/Champaign. After completing his residency at Oklahoma Teaching Hospitals, Dr. Coles entered private practice in Shawnee, Oklahoma. He practiced in Shawnee until joining Urology Associates in 1997. Dr. Coles is certified by the American Board of Urology. An avid hunter and sportsman, Dr. Coles and his wife, Monette, have two daughters.


Nicholas Pappas, M.D.

Nicholas Pappas MD - Urologist OKCDr. Pappas earned his medical degree from the University of Iowa. After completing his residency at the University of Wisconsin Medical School, Dr. Pappas served as a urologist at Tinker Air Force Base Hospital for four years. He left Tinker for private practice in 1990, and joined Urology Associates in 2003. Dr. Pappas is certified by the American Board of Urology. In addition to his busy practice at our Hefner Pointe location, he maintains a clinic two days a week in south Oklahoma City.


Natalie Esparza, M.D.

Natalie Esparza MD - Urologist Associates OKCDr. Esparza earned her medical degree from the University of Oklahoma. She completed her residency at Southern Illinois University. Dr. Esparza entered private practice in 1999, and joined Urology Associates in 2005. She is certified by the American Board of Urology.


Johnny D. Hickson III, M.D.

Johnny D. Hickson III, M.D. - Urologist Associates OKCBorn and raised here in Oklahoma City, Dr. Hickson attended Putnam City High school, Southern Nazarene University. and the University of Oklahoma College of Medicine. After his training with the Texas Tech Health Sciences Center Department of Urology residency program, he has moved back home to join Urology Associates. In addition to his busy practice at our Oklahoma City location, Dr. Hickson maintains a bi-weekly clinic in Weatherford. He specializes in Men's Health and Minimally Invasive Surgery.

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