Tammy Penhollow, D.O. She is board certified in Anesthesiology and in Pain Medicine by the American Board of Anesthesiology. She earned her Doctor of Osteopathic Medicine from Kirksville College of Osteopathic Medicine in Kirskville, MO. After a Transitional Year Internship at Sacred Heart Medical Center in Spokane, WA, she entered active duty service in the United States Navy. After several years of service, Dr. Pennhollow received an honorable discharge from the US Navy and completed her formal training in a Pain Management Fellowship at Stanford.