About Us

Our dedicated surgeons, physicians and treatment staff

Dr. Susanne Fix

Dr. Susanne Fix received her Doctorate of Medicine from the West Virginia University School of Medicine. She completed her residency with the University of Louisville affiliated hospitals and her fellowship with the Leatherman Spine Institute.

Dr. Fix is board-certified with the American Board of Neurologic Surgeons and is a member of the American Association of Neurological Surgeons, The Congress of Neurological Surgeons, SOLAS- the Society of Lateral Access Surgery, and the Alaska State Medical Association.

Dr. Fix is the Surgery Chair and Neurosurgery Sub-Section Chair at Providence Alaska Medical Center, and affiliated with Alaska Regional Hospital, Alaska Surgery Center, Geneva Woods Surgery Center, Alaska CyberKnife Center, and Alaska Gamma Knife Center and St. Elias Rehab Hospital. She is also a mentor with the Gifted Mentorship program through the Alaska School District.

Dr. Richard Perrin

Dr. Perrin received his Doctorate of Medicine from the Queen’s University, Kingston, Ontario, Canada. He completed his residency at the University of British Columbia, Vancouver, British Columbia, Canada. Dr. Perrin completed two fellowships in Neuro-Oncology and Complex Spine from the University of Toronto, Ontario, Canada. He also has a Master’s in Business Administration from the University of Tennessee.

Dr. Perrin has served as the Chief of Neurosurgery at the Cleveland Clinic in Abu Dhabi, United Arab Emirates.

Dr. Perrin is board-certified with the American Board of Neurological Surgeons. He is also a member of the Congress of Neurological Surgeons and American College of Surgeons.

Dr. Perrin is credentialed at Alaska Regional Hospital and Providence Alaska Medical Center.  Richard Perrin, M.D., FAANS, FACS, FRCSC, MBA

Dr. Samuel Waller

Dr. Waller received his Doctorate of Medicine from Georgetown University, School of Medicine. He completed his residency also at University of Colorado. Dr. Waller completed his fellowship in NeuroCritical Care from the University of Colorado.

Dr. Waller is board-certified with the American Board of Neurological Surgeons and the Congress of Neurological Surgeons.

Dr. Waller is credentialed at Alaska Regional Hospital and Providence Alaska Medical Center.

Dr. Scott Hines

Dr. Scot Hines received his Doctorate of Medicine from Marshall University School of Medicine. He completed his residency with the Indiana University School of Medicine. His fellowship focused on epilepsy and neurophysiology at the Indiana University School of Medicine.

​Dr. Hines is board-certified with the American Board of Psychiatry and Neurology, with added qualifications in clinical neurophysiology; and the American Board of Clinical Neurophysiology. He is a member of the American Academy of Neurology and the Alaska State Medical Association, and is affiliated with the Alaska Native Medical Center.

Dr. Tasha Powell

Dr. Powell was Born in Chicago, IL however has spent most of her youth in Europe until her return to the U.S. in 1996, after which she completed high school and college education in Anchorage, Alaska. Following a degree in molecular biology and piano performance she joined the Military via commissioning in the Officer ranks through the Army Health Professions Scholarship Program; a prestigious program for military sponsored medical school training. Through this scholarship program she completed a Doctorate of Medicine degree (MD) at Wake Forest School of Medicine, graduating top third of her medical school class in 2009.  

Having developed an interest in the complexities of the central and peripheral nervous system disease she completed residency in Adult Neurology at Walter Reed National Military Medical Center, one of the most prominent U.S. Military Medical Centers known for its history of service to many U. S. presidents in the 20th century. Her active-duty service positions include Chief of Neurology Services, and Officer in Charge (OIC) for the Neurology Departments at Evans Army and Fort Belvoir Community Hospitals, respectively. Dr. Powell has held several faculty appointments through USUHS (Uniformed Services University of the Health Sciences), University of Colorado School of Medicine, and University of Washington School of Medicine where she taught rotating medical students and residents. She has been published with abstract presentations at several society meetings. 

Since separating from the military in 2017, Dr. Powell has continued to work in the field of neurology with ongoing interest in all aspects of adult neurology conditions. Generally, patients appreciate Dr. Powell’s candid and thorough approach, with attention to education on the disease process and encouragement for patient involvement in treatment plan decision making. Dr. Powell has found a strong following from her patients due to her passion for disease prevention via nutrition and lifestyle factors which in light of most recent evidence, she believes can modulate the most common disease processes encountered in our society today. 

Stephen R. Poggi

Mr. Poggi is a certified physician assistant. Prior to joining Coastal Neurology and Neurosurgery, Stephen worked as a PA at the Anchorage Native Primary Care Center where he was responsible for providing coverage in a primary care environment. Stephen also has worked with a local orthopedic group.

He has over 24 years of medical experience as a paramedic and EMS Battalion Chief with Anchorage Fire Department. He has extensive experience managing major medical incidents including cardiac arrests, multi-vehicle incidents, and major traumas.

Mr. Poggi is highly skilled at communicating effectively with patients and families experiencing medical or traumatic events in highly stressful situations, and working with other providers to manage complex medical issues.

Mr. Poggi is a longtime Alaska resident and enjoys fly fishing, skiing, rafting, camping and hiking with his family. In 2015, Mr. Poggi earned his PA-C from the University of Washington MEDEX Northwest program.


  • Bachelor of Science in Clinical Health Services (2015)
    University of Washington MEDEX Northwest, Seattle, Washington

  • Advanced Paramedic Training Program (1986)
    Oregon Health Sciences University, Portland, Oregon

  • Bachelor of Arts in Accounting (1982)
    Michigan State University, East Lansing, Michigan


  • Licensed Physician Assistant

  • Licensed Mobile Intensive Care Paramedic

  • AHA ACLS Provider

  • Pre-hospital Trauma Life Support

  • Health Care Provider (CPR)


  • Alaska Academy of Physician Assistants

Aaron Thrasher

Aaron Thrasher received his Master of Health in Physician Assistant Studies from South College in Knoxville Tennessee in 2014. He received a Bachelor of Science in Biochemistry from Montana State University in 2007 where he graduated with honors. He has been employed as a neurosurgical PA since completion of his training in 2014. He is a board-certified physician assistant and is a member of the NCCPA. He has privileges at Alaska Regional Hospital and Providence Alaska Medical Center.