Cardiologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Chiropractor providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dentist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Dermatologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Family Physician providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
OB-GYN providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Ophthalmologist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Orthopedic Surgeon providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Pediatrician providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Physical Therapist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Podiatrist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Psychiatrist providers include doctors, nurses, nurse practitioners, and physician assistants. They often maintain long-term relationships with you and advise and treat you on a range of health related issues.
Medical School: University of Colorado School of Medicine – Aurora, CO
Internship
Internal Medicine: Basset Medical Center – Cooperstown, NY
Residency
Diagnostic Radiology: University of Colorado – Aurora, CO
Fellowship
Interventional Radiology: Mayo Clinic – Rochester, MN
Board Certification
American Board of Radiology 2024
Samuel Tesfalidet, MD, is a board-certified interventional radiologist at the Greenwood Village, Colorado office of RIA Endovascular. Dr. Tesfalidet is highly skilled with many years of experience in radiology, caring for patients of all ages.
Dr. Tesfalidet’s childhood dream was to become a physician. He earned his medical degree at the University of Colorado School of Medicine in Aurora and completed an internship in internal medicine at Bassett Medical Center in Cooperstown, New York.
Dr. Tesfalidet also completed a residency in diagnostic radiology at the University of Colorado in Aurora and a fellowship in interventional radiology at the Mayo Clinic in Rochester, Minnesota.
He loves physiology and the diversity involved in practicing interventional radiology.
Dr. Tesfalidet uses the latest advances in radiology technologies and procedures, frequently using new applications building on his core set of procedural skills.
He enjoys interacting with and caring for patients in all life stages. He skillfully diagnoses medical conditions and helps treat patients undergoing minor procedures as well as major procedures needed for life-threatening problems.
When he’s not at the RIA Endovascular office, Dr. Tesfalidet enjoys spending time with his friends and family, traveling internationally, and exploring national and state parks. He also enjoys camping, hiking, fishing, and skiing.
Dr. Tesfalidet welcomes new and existing patients to RIA Endovascular and looks forward to improving their health and well-being.
University of Cincinnati College of Medicine – Cincinnati, OH
Fellowship
Mallinckrodt Institute of Radiology – St. Louis, Missouri
Board Certification
American Board of Radiology – Diagnostic Radiology Board Certification American Board of Radiology – Interventional Radiology Board Certification
Awards
Galen Award for Academic Excellence in the Anatomical Sciences, Wright State University 2002
Brian Ravert, MD, practices as a vascular and interventional radiologist with RIA Endovascular in Greenwood Village and Windsor, Colorado.
After studying physics during undergrad, Dr. Ravert graduated from The Ohio State University College of Medicine in Columbus, Ohio. With a focus on the intellectual challenges and patient service potential of medicine, Dr. Ravert interned in internal medicine at Riverside Methodist Hospital, also located in Columbus, Ohio. He then completed his residency at the University of Cincinnati College of Medicine.
Dr. Ravert completed a fellowship at the Mallinckrodt Institute of Radiology in St. Louis, Missouri. He is board-certified by the American Board of Radiology in diagnostic radiology and interventional radiology. He received the Galen Award for Academic Excellence in the Anatomical Sciences from Wright State University.
In his practice as an interventional radiologist, Dr. Ravert focuses on analytical and procedural techniques, as well as the importance of direct patient contact and high-quality patient care.
Outside of work, Dr. Ravert spends time with his family, reads, and unwinds by playing the guitar.
Medical School: University of California, Los Angeles David Geffen School of Medicine – Los Angeles, CA
Internship
Internal Medicine: University of Nebraska Medical Center – Omaha, NE
Residency
Radiology: University of Nebraska Medical Center – Omaha, NE
Fellowship
Vascular and Interventional Radiology: University of New Mexico Hospital – Albuquerque, NM
Sean Walker, MD, is a board-certified vascular and interventional radiologist in Denver, Colorado. Dr. Walker is highly trained and has more than a decade of experience caring for patients of all ages.
He earned his medical degree from the David Geffen School of Medicine at the University of California, Los Angeles, and completed an internship in internal medicine at the University of Nebraska Medical Center in Omaha.
Dr. Walker stayed in Omaha to complete a residency in radiology at the University of Nebraska Medical Center and then relocated to Albuquerque, New Mexico, for a fellowship in vascular and interventional radiology at the University of New Mexico Hospital.
He has published an array of research in medical journals and has presented his findings at medical conventions nationwide.
Dr. Walker enjoys staying active and spending time with family and friends when he’s not at the office.
He looks forward to maximizing patients’ quality of life and compassionately welcomes them to one of the multiple hospital sites he covers in Denver, Colorado.
Medical School: University of Colorado School of Medicine – Denver, ColoradoInternshipInternal Medicine: University of Wisconsin – Madison, Wisconsin
Surgery: University of Colorado – Denver, Colorado
Residency
Diagnostic and Interventional Radiology: University of Colorado – Denver, Colorado
Fellowship
Vascular and Interventional Radiology: University of Colorado – Denver, Colorado
Board Certifications
American Board of Radiology: Interventional Radiology
American Board of Radiology: Diagnostic Radiology
Tyler Green, MD, is a board-certified vascular and interventional radiologist at RIA Endovascular in Greenwood Village, Colorado. Dr. Green is committed to providing outstanding care to patients seeking solutions for vascular issues and interventional radiology procedures, such as prostate artery embolization and minimally invasive vein treatments.
Dr. Green earned his medical degree from the University of Colorado School of Medicine in Denver, Colorado. He continued his medical training at the University of Wisconsin in Madison, where he completed an internal medicine internship. Dr. Green also finished a surgical internship at the University of Colorado.
Dr. Green’s dedication and passion for radiology encouraged him to return to the University of Colorado to pursue a diagnostic and interventional radiology residency. Dr. Green also completed a fellowship at the same university to refine his specialization. He has since authored numerous publications, presentations, and articles.
With two board certifications from the American Board of Radiology in interventional radiology and diagnostic radiology, Dr. Green is an invaluable asset to patients at RIA Endovascular. His dedication to ongoing learning and providing superior patient care shines through in every patient interaction.
Dr. Green is thrilled to offer patients state-of-the-art treatments and unwavering support, ultimately improving the quality of life for those under his care.
Medical School: Loyola University Stritch School of Medicine – Chicago, IL
Internship
Internal Medicine: Exempla St. Joseph Hospital – Denver, CO
Residency
Diagnostic Radiology: University of Colorado – Aurora, CO
Fellowship
Interventional Radiology: Medical College of Wisconsin – Milwaukee, WI
Board Certification
American Board of Radiology 2016
Tony Brown, MD, is the Medical Director and a board-certified vascular and interventional radiologist specializing in pelvic stabilization and kyphoplasty at RIA Endovascular. Dr. Brown sees patients at the practice's location in Greenwood Village, Colorado.
He pursued medical school at Loyola University Stritch School of Medicine in Chicago, Illinois, followed by an internship in Internal Medicine at Exempla St. Joseph Hospital in Denver, Colorado, and a residency in Diagnostic Radiology at the University of Colorado in Aurora.
Dr. Brown completed his fellowship in Interventional Radiology at the Medical College of Wisconsin in Milwaukee.
He has contributed to a number of publications and presentations, such as:
Gipson MG, Smith, MT, Durham JD, Brown A, Johnson T, Ray CE Jr, Gupta RK, Kondo KL, Rochon PJ, Ryu RK. Intravascular US-Guided Portal Vein Access: Improved Procedural Metrics during TIPS Creation. Journal of Vascular and Interventional Radiology, 2016 Aug; 27(8):1140-7. PMID: 26852944
Charles E Ray, Anthony C Brown, Tyler J Green, Helena Winston, Sara M Kreidler, Deborah H Glueck, Paul J Rochon. Survival outcomes in patients with advanced hepatocellular carcinoma treated with drug-eluting bead chemoembolization. American Journal of Roentgenology. 2015; 204: 440-447. PMID: 25615768
Brown A, Malden E, Kugelmas M, Kortz E. Diagnosis of pancreatic duct-portal vein fistula; a case report and review of the literature. Journal of Radiology Case Reports. 2014 March; 8(3):31-38. PMID: 24967026
In 2016, Dr. Brown obtained board certification from the American Board of Radiology (ABR).
He is committed to caring for patients at RIA Endovascular and truly provides exceptional care.
Medical School: University of Chicago Pritzker School of Medicine – Chicago, IL
MBA: University of Chicago Graduate School of Business – Chicago, IL Internship
Transitional: Resurrection Hospital – Chicago, IL
Residency
Diagnostic Radiology: University of Washington Medicine – Seattle, WA
Fellowship
Interventional Radiology: University of Washington Medicine – Seattle, WA
Board Certification
American Board of Radiology 2010
Peter Stratil, MD, MBA, practices as a vascular interventional radiologist from the RIA Endovascular location in Greenwood Village, Colorado. Dr. Stratil performs minimally invasive procedures, treating conditions like cancer and vascular disease.
Dr. Stratil earned his medical degree from the University of Chicago Pritzker School of Medicine in Chicago, Illinois, and his MBA from the University of Chicago Graduate School of Business. In addition to interpreting radiology studies, he is also skilled in business development for radiology practice.
After a transitional internship at Resurrection Hospital in Chicago, Illinois, Dr. Stratil completed a residency in diagnostic radiology and a fellowship in interventional radiology at the University of Washington Medicine in Seattle.
Dr. Stratil is board-certified by the American Board of Radiology. He has co-authored publications on embolotherapy for visceral trauma, vascular imaging, pediatric radiology, and giant cell tumors. He has also presented on the business of radiology before the Association of University Radiologists.
Medical School: University of Washington – Seattle, WA
Internship
Surgery/Medicine: Swedish Medical Center – Seattle, WA
Residency
Diagnostic Radiology: University of Washington – Seattle, WA
Fellowship
Vascular/Interventional Radiology: University of Washington – Seattle, WA
Board Certifications
American Board of Radiology 2006
Vascular and Interventional Radiology Certificate of Added Qualification 2008
Todd Kooy, MD, is a highly regarded board-certified vascular and interventional radiologist serving patients at RIA Endovascular in Greenwood Village, Colorado. Dr. Kooy specializes in treating vascular issues using cutting-edge interventional radiology procedures that offer patients benefits like less pain, faster recovery times, and minimized scarring.
Dr. Kooy attended the University of Washington in Seattle, where he earned his medical degree, setting the stage for his medical career.
Continuing his medical training, Dr. Kooy completed a comprehensive internship in surgery and medicine at Swedish Medical Center in Seattle. His dedication and passion for the field prompted Dr. Kooy to pursue a diagnostic radiology residency at the University of Washington. This rigorous program equipped him with a strong foundation in radiology.
Dr. Kooy completed a fellowship at the University of Washington in Seattle to refine his expertise in vascular and interventional radiology. He holds board certifications from the American Board of Radiology and a Vascular and Interventional Radiology Certificate of Added Qualification (CAQ). These certifications highlight Dr. Kooy’s commitment to providing his patients with advanced care.
With a dedication to ongoing learning and delivering superior patient care, Dr. Kooy strives to give each patient the personalized treatment they deserve at RIA Endovascular.
Medical School: Case Western Reserve University – Cleveland, OH
Residency
Diagnostic Radiology: University of Utah – Salt Lake City, UT
Fellowship
Vascular and Interventional Radiology: Medical College of Wisconsin – Milwaukee WI
Board Certifications
Board Certified Diagnostic Radiology 2012
CAQ-Vascular and Interventional Radiology 2014
Y90 Authorized User – State of Colorado 2016
Registered Physician in Vascular Interpretation (RPVI) 2018
Greg Martin, MD, is a board-certified vascular and interventional radiologist providing exceptional care at RIA Endovascular in Greenwood Village, Colorado. Dr. Martin’s dedication to patient well-being and innovative solutions has made him an invaluable asset to the team.
Dr. Martin attended medical school at Case Western Reserve University in Cleveland, Ohio. After earning his medical degree, he undertook a rigorous residency in diagnostic radiology at the University of Utah in Salt Lake City.
Dr. Martin’s commitment to excellence in interventional radiology encouraged him to complete a vascular and interventional radiology fellowship at the Medical College of Wisconsin in Milwaukee, further enhancing his expertise.
With multiple board certifications, including in diagnostic radiology and interventional radiology, and a Certificate of Added Qualification (CAQ) in vascular and interventional radiology, Dr. Martin is uniquely qualified to offer patients a comprehensive range of cutting-edge treatments and procedures. He is also a Y90 Authorized User in Colorado and became a Registered Physician in Vascular Interpretation (RPVI) in 2018, highlighting his dedication to staying at the forefront of his field.
Dr. Martin’s areas of expertise include complex vascular interventions, ensuring patients benefit from the latest medical advancements. His unwavering commitment to patient care, combined with his extensive education and certifications, makes him an invaluable member of the RIA Endovascular team, providing patients with exceptional medical care and innovative solutions.
Medical School: Chicago College of Osteopathic Medicine – Downers Grove, IL
Residency
Diagnostic Radiology: University of California San Diego – San Diego, CA
Internship
General Surgery: Exempla St. Joseph Hospital – Denver, CO
Fellowship
Vascular and Interventional Radiology: University of Washington – Seattle, WA
Cosette Stahl, DO, practices as a vascular and interventional radiologist at the RIA Endovascular location in Greenwood Village, Colorado.
Dr. Stahl studied medicine at the Medical School of the Chicago College of Osteopathic Medicine in Downers Grove, Illinois, driven by her intellectual curiosity and a desire to serve the community. During her medical training, she developed an interest in anatomy and minimally invasive procedures, resulting in her specializing in interventional radiology.
She completed a residency in diagnostic radiology at the University of California San Diego and interned in general surgery at Exempla St. Joseph Hospital in Denver, Colorado. Dr. Stahl also completed a fellowship in vascular and interventional radiology at the University of Washington in Seattle.
Dr. Stahl is licensed by several state medical boards across the country, including Texas, Colorado, Kansas, Nebraska, and Hawaii. She also holds licenses from the Osteopathic Medical Board of California, the Washington State Department of Health, and the American Board of Radiology in Diagnostic Radiology.
Her publications cover topics like radiation protection during fluoroscopy and imaging for intrathoracic mediastinal thyroid goiters. Dr. Stahl is excited by the potential of interventional radiology to interact with all medical specialties.
In her free time, Dr. Stahl enjoys the great outdoors of Colorado as an avid skier, hiker, and cycler, sometimes in the company of her family and poodle. She is also interested in cooking and yoga.
Tufts University School of Medicine, Boston, MA 2006 – 2010 M.D., Doctor of Medicine
Internship
St. Luke’s – Roosevelt Hospital Center, New York, NY 2010 – 2011 Columbia University College of Physician and Surgeons Internal Medicine Preliminary Year Internship
Residency
Boston University Medical Center, Boston, MA 2011 – 2015 Diagnostic Radiology Residency
Fellowship
Stanford University Medical Center, Stanford, CA 2015 – 2017 Diagnostic Neuroradiology Fellowship
