Overview of Dr. Ryken
Dr. Timothy Ryken is a neurosurgeon currently residing in Colorado and is the former Chief of Neurosurgery at Dartmouth-Hitchcock Medical Center and currently Professor Adjunct with the Department of Neurosurgery University of Iowa Health Care. He received his medical degree from University of Iowa Roy J. and Lucille A. Carver College of Medicine completed residency in Neurosurgery at the University of Iowa and is a AANS VanWagenen Scholar. He has been in practice over 30 years. He specializes in brain & spinal tumor, neurosurgical spine surgery, and neurotrauma and is experienced in oncology, neurosurgical oncology, neurosurgical spine surgery, epidemiology. He has more than 200 publications, over 1500 citations and a Research Gate H score of over 65.
Education & Training
University of Iowa College of Public HealthMS, 2004 - 2007
University of CambridgeFellowship, 1995 - 1996
University of Iowa Hospitals and ClinicsChief Residency, Neurological Surgery, 1994 - 1995
University of Iowa Hospitals and ClinicsResidency, Neurological Surgery, 1990 - 1995
University of Iowa Hospitals and ClinicsInternship, Surgery, 1989 - 1990
University of Wyoming College of Health SciencesChief Residency, Family Medicine, 1988 - 1989
University of Iowa Roy J. and Lucille A. Carver College of MedicineClass of 1988
Iowa State UniversityBS, Biochemistry, 1980 - 1984
Certifications & Licensure
CO State Medical License 2022 - 2025
IA State Medical License 1989 - 2025
WA State Medical License 2021 - 2024
VT State Medical License 2020 - 2024
NH State Medical License 2017 - 2023
ME State Medical License 2020 - 2021
KS State Medical License 2015 - 2017
- American Board of Neurological Surgery Neurological Surgery
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Awards, Honors, & Recognition
- AANS VanWagenen Fellow 1995-1996
- America's Top Doctors Castle Connolly, 2007-2014
- America's Top Doctors for Cancer Castle Connolly, 2006-2013
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Clinical Trials
Publications & Presentations
PubMed
Examining barriers to implementing a surgical-site infection bundle.
Kimberly C Dukes, Heather Schacht Reisinger, Marin Schweizer, Melissa A Ward, Laura Chapin, Timothy C Ryken, Trish M Perl, Loreen A Herwaldt> ;Infection Control and Hospital Epidemiology. 2023 Jul 26Association between interhospital transfer and increased in-hospital mortality in patients with spinal epidural abscesses.
Maria K Pomponio, Imad S Khan, Linton T Evans, Nathan E Simmons, Perry A Ball, Timothy C Ryken, Jennifer Hong> ;The Spine Journal. 2022 Jun 1- 1 citations
Patients' experiences and compliance with preoperative screening and decolonization.
Ethan Wilson, Alexandre R Marra, Melissa Ward, Laura Chapin, Stephanie Boulden, Timothy C Ryken, Lynne C Jones, Loreen A Herwaldt> ;American Journal of Infection Control. 2023 Jan 1 - Join now to see all
Journal Articles
CD271+ Cells Are Diagnostic and Prognostic and Exhibit Elevated MAPK Activity in SHH Medulloblastoma
Timothy Ryken, MD, Clinical Cancer ResearchClinical prognostic indicators of surgical outcome in cervical spondylotic myelopathy.
Holly LT, Matz PG, Anderson PA, Groff MW, Heary RF, Kaiser MG, Mummaneni PV, Ryken TC, Choudhri TF, Vresilovic EJ, Resnick DK, J Neurosurg Spine. 2009 Aug;11(2):112-8. PubMed PMID: 19769490The natural history of cervical spondylotic myelopathy.
Matz PG, Anderson PA, Holly LT, Groff MW, Heary RF, Kaiser MG, Mummaneni PV, Ryken TC, Choudhri TF, Vresilovic EJ, Resnick DK, J Neurosurg Spine. 2009 Aug;11(2):104-11. PubMed PMID:19769489- Join now to see all
Books/Book Chapters
Neurosurgical Operative Atlas. Vol. 2
Chapter: Surgical management of anterior communicating artery aneurysms
Page 273 - 281Ryken TC, Loftus CMEditors: Wilkins R.Williams and Wilkins, Baltimore, MDEdition 4,Neurosurgical Operative Atlas. Vol 3
Chapter: Surgical Management of Cerebral Abscess
Page 449 - 457Ryken TC, Loftus CMEditors: Wilkins R.William and Wilkins, Baltimore, MDEdition 6,Intraoperative Monitoring Techniques in Neurosurgery.
Chapter: Intraoperative electrical and manometric monitoring techniques in lumbosacral surgery
Page 257 - 268Ryken TC, Menezes AHEditors: Loftus CM, Traynelis VC.McGraw-Hill, New York- Join now to see all
Abstracts/Posters
Fas upregulation results in increased survival of rats with intracranial malignant glioma.
Frankel B, Longo S, Kyle M, Canute GW, Ryken TC, Society for Neuroscience Abstracts, Vol. 25:2086Three dimensional culture of genetically modified glioma cell lines.
Ryken TC, Housden ES, Frankel BM, Watts C, Sofroniew MV, Traynelis VC, Congress of Neurological Surgeons 46th Annual Meeting, Montreal, CanadaFas ligand induced cytotoxicity in human malignant glioma.
Lennarson PJ, Frankel B, Julien T, Ryken TC, NeuroOncology 2(4):262- Join now to see all
Lectures
Implantable Chemotherapy.
Canadian Approval, Montreal, CABiomechanics of subaxial posterior cervical stabilization.
Congress of Neurological Surgeons 46th Annual Meeting, Montreal, CanadaTen Year Experience with Implantable Local Therapy for Malignant Brain Tumors.
Glasgow, Scotland UK- Join now to see all
Press Mentions
Dartmouth-Hitchcock Health Finances Continue to MendJune 20th, 2021
Conroy Paid Less Than PredecessorSeptember 6th, 2020
Dartmouth-Hitchcock Uses Robotic Surgical System for Spinal OperationsAugust 12th, 2019
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Professional Memberships
Hospital Affiliations
Insurance Accepted
Aetna Choice POS II
BCBS Blue Card PPO
BCBS Illinois PPO
CIGNA Open Access
CIGNA PPO
First Health PPO
Great West PPO
Humana ChoiceCare Network PPOKaiser Permanente
Multiplan PHCS PPO
Multiplan PPO
Oxford Health Freedom
Oxford Health Liberty
United Healthcare - Direct Choice Plus POS
United Healthcare - Direct Options PPO
Wellmark Alliance Select- Please verify your coverage with the provider's office directly when scheduling an appointment
