Oregon Sinus Center Team

Timothy Smith, M.D., M.P.H., F.A.C.S. - Director

Timothy L Smith, M.D., M.P.H., F.A.C.S.
Timothy L. Smith, M.D., M.P.H., F.A.C.S. is Professor and Vice Chair in the Department of Otolaryngology-Head and Neck Surgery at Oregon Health & Science University in Portland, Oregon where he also serves as Director of the Oregon Sinus Center, Chief of Rhinology and Sinus-Skull Base Surgery, and Director of Clinical Research. Dr. Smith is actively involved in clinical practice and research and serves as the Principal Investigator of the first multi-institutional, multi-disciplinary study of outcomes of sinus surgery funded by the National Institutes of Health. Dr. Smith has published over 300 peer-reviewed articles and other scientific publications and has mentored numerous faculty, fellows, residents, and post-graduate students who have substantially advanced the field of Otolaryngology-Head & Neck Surgery.

Dr. Smith is a Fellow of the American College of Surgeons, Triological Society and the American Rhinologic Society. He has been honored with the Distinguished Service Award from the American Academy of Otolaryngology-Head and Neck Surgery and the Dr. Maurice Cottle Honor Award for distinguished research from the American Rhinologic Society. He is the first American Rhinologist/Sinus Surgeon to be elected to the Collegium Oto-Rhino-Laryngologicum Amicitiae Sacrum (CORLAS).

Dr. Smith is a Past President of the American Rhinologic Society and has been elected to the Board of Directors for the American Academy of Otolaryngology-Head and Neck Surgery, and to the American Board of Otolaryngology. He is currently the Editor-in-Chief Elect of the International Forum of Allergy & Rhinology and has served as an Associate Editor of JAMA Otolaryngology-Head and Neck Surgery, and has served on the editorial boards of several other journals.

Clinical Practice

Dr. Smith’s clinical practice is limited to rhinology/nasal and sinus disorders and surgery and includes:

  • Multi-disciplinary Nasal Obstruction Clinic
  • Endoscopic Sinus Surgery
  • Computer Guided Sinus Surgery (CAT Scan/Computer-assisted)
  • Polyps and Recurrent Polyps
  • Sinusitis and Recurrent Sinusitis
  • Revision (Re-do) Endoscopic Sinus Surgery
  • Fungal Sinusitis
  • Laser Surgery

Kara Detwiller, M.D.

Kara Detwiller, MD

 Dr. Kara Detwiller is originally from New England and received a Bachelor's degree in Chinese Studies and Economics with honors at Wellesley College in Massachusetts. After working in the information technology field for several years, she decided to pursue a career in medicine. She graduated with honors from Dartmouth Medical School. She completed her Otolaryngology residency at OHSU and fellowship training in Rhinology and Skull Base Surgery at Northwestern University in Chicago. She is board certified in Otolaryngology-Head and Neck Surgery. 

Dr. Detwiller works both at OHSU and the Portland VA Medical Center. Her clinical practice is focused on nasal and sinus disorders with a particular interest in chronic sinusitis, hereditary hemorrhagic telangiectasia, and allergy. 

Mathew Geltzeiler, M.D.

Mathew Geltzeiler, M.D. specializes in endoscopic sinus surgery, treatment of sinonasal tumors, and anterior skull base surgery. Dr. Geltzeiler studied neuroscience at Brown University and medicine at Boston University School of Medicine where he graduated summa cum laude. He completed his residency training in Otolaryngology - Head and Neck Surgery at Oregon Health & Science University. Dr. Geltzeiler then spent two years at the University of Pittsburgh where he completed two fellowships in Head and Neck Oncologic Surgery and Advanced Skull Base Surgery.

Dr. Geltzeiler's clinical interests include anterior skull base surgery, management of sinonasal tumors, cerebrospinal fluid leak repair and endoscopic sinus surgery. His research interests include quality of life and olfactory outcomes associated with skull base surgery.  

Dr. Geltzeiler's clinical practice includes:

  • Endoscopic (minimally invasive) skull base surgery
  • Traditional (open) skull base surgery
  • Nasal and Sinus Tumors
  • Endoscopic Orbital Surgery
  • Polyps and Recurrent Polyps
  • Sinusitis and Recurrent Sinusitis
  • Revision (Re-do) Endoscopic Sinus Surgery
  • Fungal Sinusitis


Lindsay E. Wyant, M.S., P.A.-C.

Lindsay Wyant, MS, PA-C

Lindsay Wyant received her Bachelor of Science degree at the University of Washington in Seattle, Washington and went on to complete a Masters in Physician Assistant studies at Oregon Health & Science University in Portland, Oregon. She is nationally certified by the National Commission on Certification of Physicians Assistants.

She practiced with a private otolaryngology-head and neck surgery group in Portland before joining the Oregon Sinus Center team in 2007 as an Instructor. She serves as an instructor and mentor for physician assistant students and is actively involved Oregon Health & Science Physician Assistant Program. She has been treating rhinology and sinus related issues since 2004, and enjoys being a part of the Oregon Sinus Center.

Andrew Thomas, M.D. - Rhinology and Skull Base Surgery Fellow

William Thomas, MD
Dr. Thomas is from Seattle, Washington, and completed undergraduate degrees in Biochemistry and Molecular Biology in Portland, Oregon at Lewis & Clark College. He then returned to Seattle where he completed his M.D., as well as a year-long research fellowship focused on designing novel therapeutics for hearing loss, at the University of Washington. He completed Otolaryngology-Head and Neck Surgery residency at the University of Utah, in Salt Lake City, before returning to Portland for fellowship. He has maintained a research focus on innovation and discovery of novel therapeutics throughout his academic career, and is now applying this interest to the field of Rhinology. He is also interested in outcomes and cost research in the field of Otolaryngology to improve the quality and value of existing treatments for patients. He enjoys traveling, snowboarding, the outdoors, and cooking.

How to Make an Appointment

Please contact our office regarding scheduling appointments. Prior to scheduling an appointment, our providers often need to review chart notes related to the reason you want to be seen in order to coordinate any additional tests they may need in order to make the most of your visit.  In some cases, we will require a referral from your primary care physician.  We would be happy to discuss this with you to ensure we have all we need to expedite the scheduling process.  Please contact us by phone or email to begin the process. 

Phone: Oregon Sinus Center  503 494-7413

If you have medical records you would like to fax, please fax those records to 503 346-6826.