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Oklahoma State University

Obstetrics and Gynecology

Residency Program

Since its initiation in 1982, this four-year residency program has trained over 100 Obstetricians and Gynecologists practicing successfully across the nation. Currently, the program trains two OSU and three OMECO residents annually.

Rotations in addition to Obstetrics and Gynecology include:

  • Maternal Fetal Medicine,
  • Reproductive Endocrinology and Infertility
  • Gynecology Oncology
  • Urogynecology

For more information, please contact:

Cassidy Schat

Dr. Lance Frye
Department Chair, Program Director

Clerkship Program

If you are interested in setting up an elective rotation with the OSU Obstetrics and Gynecology program during your fourth year, please contact Samantha Heitman at

Patient Care

Women of all ages and stages in life share specific health needs and concerns including birth control, childbirth, and menopause. OSU OBGYN offers a variety of women’s services from prenatal care and delivery, 4D ultrasounds, well woman exams, IUD insertion and cancer and STD screenings.

For more information or to make an appointment, call 918-586-4500.

Obstetrics and Gynecology- Houston Center
717 S. Houston Ave., Suite 200
Tulsa, OK 74127
918-586-4528 (fax)


Lance T. Frye, M.D., FACOG
Department Chair
Clinical Associate Professor

William D. Po, M.D., FACOG
Program Director
Clinical Professor

Corey R. Babb, D.O.
Director of Clinical Operations
Clinical Assistant Professor

Daniel R. Oraee, D.O.
Clerkship Director
Clinical Assistant Professor

Carlos M. Guevara, D.O. 
Clinical Assistant Professor

Erin E. Brown, D.O. 
Clinical Assistant Professor

Bethany Onley
Nurse Practitioner