Dr. Ana K. Islam

Sarah Oltmann is a General Surgeon in Dallas, Texas. Dr. Oltmann is rated as a Distinguished provider by MediFind in Parathyroidectomy. Her top areas of expertise are Hyperparathyroidism, Pheochromocytoma, Familial Isolated Hyperparathyroidism, Parathyroidectomy, and Thyroidectomy.

John Birbari is a General Surgeon in Fort Worth, Texas. Dr. Birbari is rated as a Distinguished provider by MediFind in Parathyroidectomy. His top areas of expertise are Hernia, Gallbladder Disease, Congenital Diaphragmatic Hernia, Parathyroidectomy, and Gastrostomy.

Dr. Sarah Mitchell has been a board-certified general surgeon in the DFW area since 2020, primarily serving the trauma surgical needs of North Texans. Since 2022, she also has served as an assistant professor in the Departments of Surgery at Texas Christian University and the University of North Texas Health Science Center, both in Fort Worth. She is fellowship-trained in endocrine surgery and uses endoscopic, laparoscopic and robotic surgical techniques to treat cancerous tumors, gastrointestinal reflux, thyroid disease, thoracic disorders and other concerns. Dr. Mitchell earned her medical degree Magna Cum Laude while attending The University of Texas Health Science Center at San Antonio. She also completed her general surgery residency at UTHSC in San Antonio. She went on to complete her endocrine surgery fellowship at UT Southwestern in Dallas. Dr. Mitchell is a member of the American Association of Endocrine Surgeons, American College of Surgeons, American Thyroid Association, Association of Women Surgeons, Society of American Gastrointestinal and Endoscopic Surgeons, Society of Surgical Oncologists and Texas Medical Association. Dr. Mitchell is rated as an Advanced provider by MediFind in Parathyroidectomy. Her top areas of expertise are Ogilvie Syndrome, Cholecystitis, Hyperparathyroidism, Parathyroidectomy, and Gallbladder Removal.