Patient Portal; Select Page. Flagstaff OB/GYN. Have Questions? ... Call. Main Flagstaff OB/GYN Number: 928-779-7851. Dr. Graff: 928-779-7854. Dr. Lindstrom: 928-779-7872. Dr. Perrin: 928-779-7852. Dr. Williams: 928-779-7853. Fax ... Friday: 8 am - 1 pm. Services. We recognize the importance of a patient-centered medical experience..