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: 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 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 Texas Southwestern Medical School – Dallas, TX
Internship
General Surgery: Indiana University School of Medicine – Indianapolis, IN
Residency
Diagnostic Radiology: University of Texas Southwestern Medical Center – Dallas, TX
Fellowship
Vascular & Interventional Radiology: The Western Pennsylvania Hospital – Pittsburgh, PA
Board Certifications
American Board of Radiology 1997
Certificate of Added Qualification in Vascular and Interventional Radiology 1999
American College of Phlebology – Member 2009
Ben Kassanoff, MD, is a board-certified vascular and interventional radiologist with RIA Endovascular serving patients in Denver, Colorado. Dr. Kassanoff is deeply committed to delivering exceptional care and innovative solutions to patients seeking treatment for various vascular and interventional radiology procedures.
Dr. Kassanoff earned his medical degree from the University of Texas Southwestern Medical School in Dallas, Texas. Continuing his medical education, Dr. Kassanoff embarked on a general surgery internship at Indiana University School of Medicine in Indianapolis, Indiana.
Dr. Kassanoff’s dedication to the field led him to pursue a residency in diagnostic radiology at the University of Texas Southwestern Medical Center in Dallas. This rigorous program provided him with a solid foundation and advanced skills in radiology.
Dr. Kassanoff sought advanced training through a fellowship at The Western Pennsylvania Hospital in Pittsburgh to refine his vascular and interventional radiology specialization.
In recognition of his expertise, Dr. Kassanoff obtained board certifications from the American Board of Radiology and a Certificate of Added Qualification in Vascular and Interventional Radiology. He also became a member of the American College of Phlebology in 2009.
Dr. Kassanoff’s areas of interest include peripheral vascular intervention, genitourinary intervention, vertebroplasty/kyphoplasty, and complex venous access procedures.
With his extensive education, certifications, and dedication to exceptional patient care, Dr. Kassanoff continues to impress patients and colleagues at RIA Endovascular.
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.
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 Virginia School of Medicine – Charlottesville, VA
Residency
Interventional Radiology: Michigan Medicine – Ann Arbor, MI Riverside Medical Center – Newport News, VA
Fellowship
Interventional Radiology: Michigan Medicine – Ann Arbor, MI
Nishant Patel, MD, MBA, is an experienced interventional radiologist working at the RIA Endovascular office in Greenwood Village, Colorado.
The son of two physicians, Dr. Patel originally studied biochemistry before graduating from the University of Virginia School of Medicine in Charlottesville, Virginia. He completed a fellowship and residency in interventional radiology at Michigan Medicine and a residency at Riverside Medical Center in Newport News, Virginia.
Dr. Patel has co-authored publications on topics including interventional radiology-operated endoscopy, interventional radiology-operated cholecystoscopy, gastroduodenal and pancreatic surgical techniques and imaging, post-operative colon and urinary diversion surgical techniques and imaging, imaging of presacral masses, and endovascular thrombolysis for extremity frostbite.
Among his honors and awards, Dr. Patel is the recipient of the American College of Radiology’s Radiology Leadership Summit Scholarship, the Michigan Society of Interventional Radiology Resident Research Award (First Place), and the ACR Gold Merit Award.
Today, Dr. Patel provides care for new and existing patients dealing with medical issues such as peripheral artery disease. He emphasizes the need for medical knowledge, imaging skills, and mental openness when interpreting imaging results. In his practice as an interventional radiologist, he works with clinicians in every specialization and provides direct patient care.
When not at work, Dr. Patel relaxes by playing volleyball and listening to electronic music at home or in concert.
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.
