The Urology Surgery Associates (USA) is an association of Urologists to provide specialized urological procedures to patients in this area.

Our Doctors
Daniel P. Barnes, MD Shelby Barnes, MD D. Glen Coles, MD	Paul Donat, MD J. Samuel Little, MD Natalie A. Esparza, MD	Nicolas Pappas, MD Barbara Voss-Alvarez, MD

Daniel P. Barnes M.D. 11000 Hefner Pointe Drive Oklahoma City, OK 73120 405-749-9655 405-749-1001 FAX	Specialty is Urology Graduate of University of Oklahoma School of Medicine Residency in Urology at Oklahoma Memorial Hospital In Practice since 1988 Certified by The American Board of Urology Member of OK County Medical Society Member of American Urological Assn.
Shelby Barnes, M.D. 11000 Hefner Pointe Drive Oklahoma City, OK 73120 405-749-9655 405-749-1001 FAX	Specialty is Urology Graduate of University of Oklahoma School of Medicine Residency in Urology at Oklahoma Memorial Hospital In practice since 1955 Certifed by The American Board of Urology Member of American Urological Assn. Member of American Medical Assn. Member of OK Medical Assn. Member of OK County Medical Assn.
D. Glen Coles, M.D. 11000 Hefner Pointe Drive Oklahoma City, OK 73120 405-749-9655 405-749-1001 FAX	Graduate of University of Illinois Medical School Residency at Oklahoma Teaching Hospital Certified by The American Board of Urology Member American Medical Assn. Member American Urological Assn. Member Alpha Omega Alpha
Paul Donat, M.D. 11000 Hefner Pointe Drive Oklahoma City, OK 73120 405-749-9655 405-749-1001 FAX	Graduate of University of OK Medical School Residency at University of OK Medical School Certified by The American Board of Urology Member American Medical Assn. Member OK State Medical Assn.
Natalie A. Esparza, M.D. 11000 Hefner Pointe Drive Oklahoma City, OK 73120 405-749-9655 405-749-1001 Fax	Graduate of Universtiy of OK Medical School Certified by The American Board of Urology Member American Medical Assn. Member OK State Medical Assn.
J. Samuel Little, M.D. 11000 Hefner Pointe Drive Oklahoma City, OK 73120 405-749-9655 405-749-1001 FAX	Graduate of Washington University Medical School Residency in Urology at Indiana University Medical Center In Practice since 1993 Certified by The American Board of Urology Member American Urologic Assn Member American Assn. of Clinical Urologists Member Society of University Urologists Member Society of Basic Urology Research Member American Medical Assn. Member OK State Medical Assn.
Nicholas Pappas, M.D. 11000 Hefner Pointe Drive Oklahoma City, OK 73120 405-749-9655 405-749-1001 FAX E-Mail	Specialty is Urology Graduate of Iowa Medical School Residency in Urology at University of Wisconsin In Practice since 1986 Certified by The American Board of Urology Fellow-American College of Surgeons Special interest is Brachytherapy (Radioactive seed implantation for prostate cancer.
Barbara Voss-Alvarez, M.D. 11000 Hefner Pointe Drive Oklahoma City, OK 73120 405-749-9655 405-749-1001 FAX	Graduate of University of Oklahoma Medical School Residency in Urology Oklahoma Teaching Hospital In Practice Since 1991 Certified by The American Board of Urology Member American Medical Assn. Member OK State Medical Assn. Member American Urological Assn. Member Alpha Omega Alpha