For the second year in a row, Tulsa OB/GYN Associates Dr. Grant Cox earns a Family Favorite. Dr. Cox values the patient-physician relationship and works with his patients over a lifetime of changing health needs. As the parent of twins who spent their first few days in the neonatal intensive care unit, Dr. Cox brings unique compassion to his obstetrics practice. His offices are located in the Williams Medical Plaza on the St. John campus.