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 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: 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 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 Pennsylvania – Philadelphia, PA
Internship
Transitional: St. John’s Mercy Medical Center – Creve Coeur, MO
Residency
Diagnostic Radiology: Mallinckrodt Institute of Radiology, Washington University – St. Louis, MO
Fellowship
Interventional Radiology: Medical College of Wisconsin – Milwaukee, WI
Board Certification
American Board of Radiology 2010
Certificate of Added Qualification for Vascular and Interventional Radiology 2012
William Grande, MD, is a board-certified vascular and interventional radiologist. Dr. Grande delivers exceptional care to patients at the practice's location in Greenwood Village, Colorado. He helps those experiencing such ailments as peripheral artery disease, deep vein thrombosis (DVT), and many other conditions.
Dr. Grande earned his medical degree from the University of Pennsylvania in Philadelphia. After finishing medical school, he pursued a transitional internship at St. John's Mercy Medical Center in Creve Coeur, Missouri. His dedication to the field led him to a residency in diagnostic radiology at the Mallinckrodt Institute of Radiology, Washington University in St. Louis, Missouri.
Dr. Grande further honed his skills through an interventional radiology fellowship at the Medical College of Wisconsin in Milwaukee.
As a leader in vascular interventional radiology, Dr. Grande has authored numerous medical articles, publications, and presentations. He achieved board certification from the American Board of Radiology nearly 15 years ago, solidifying his expertise in the field. Dr. Grande also obtained a Certificate of Added Qualification (CAQ) for Vascular and Interventional Radiology in 2012, showcasing his commitment to providing advanced patient care.
With this impressive educational background and certifications, Dr. Grande continues to excel at RIA Endovascular. He looks forward to working with new patients and delivering personalized care through cutting-edge treatments and modern techniques.
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.
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: 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.
Diagnostic Radiology: University of Colorado – Aurora, CO
Fellowship
Interventional Radiology: University of Colorado – Aurora, CO
Board Certification
American Board of Radiology 2018
Matt Brown, MD, is a board-certified vascular and interventional radiologist at RIA Endovascular. Dr. Matt Brown sees patients at the practice's Greenwood Village, Colorado office.
He pursued medical school at New York Medical College in Valhalla, New York, followed by an internship in Preliminary Medicine at Greenwich Hospital in Greenwich, Connecticut.
He completed his residency in Diagnostic Radiology at the University of Colorado in Aurora and a fellowship in Interventional Radiology at the University of Colorado.
In 2018, Dr. Matt Brown obtained board certification from the American Board of Radiology (ABR). He has contributed to many presentations and publications, like:
Brown MA, Nevrekar D, Chung JH. Factors leading to precipitation of peri-breast implant gas following airline travel to high altitude. IRB approved retrospective review of 390 CT scans. American Journal of Roentgenology. 2015;205: 971-975. 10.2214/AJR.15.15031
DePopas E, Brown MA Varicose Veins and Lower Extremity Venous Insufficiency. Semin intervent Radiol 2018; 35(01): 056-061 DOI: 10.1055/s-0038-1636522
Bakdash K, Schramm KM, Annam A, Brown MA et al. Complication of Renal Biopsy. Semin Intervent Radiol 2019; 36:97-103 PMID 31123379
Dr. Matt Brown is kind and team-oriented. His favorite part about working with the team at RIA is his colleagues and patients. Not only is the team technically great, but he says they’re also genuine and caring people.
He also loves to see how happy the patients are with recovery time and their results after procedures. Treating conditions through a tiny incision and having the patients say, “That’s it?” afterward never gets old.
Dr. Matt Brown enjoys spending as much time as possible outside in his free time with his wife, Amber, their son, and their lazy, 120-pound mutt, Morris. He also has a 1984 Toyota 4X4 truck that he is slowly fixing up.
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.
