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.
Apex Endovascular is Northern Colorado’s first and only outpatient facility dedicated to minimally invasive image-guided therapies. Board-certified vascular specialist Shawn Ahmed, MD, PhD, offers comprehensive vascular interventional care, wound care, and vascular health support in the Fort Collins, Colorado, office.
Dr. Ahmed completed his undergraduate studies at Colorado Mesa University in Grand Junction, Colorado. He went on to earn a doctorate in bio-organic chemistry and a medical degree at Creighton University School of Medicine in Omaha, Nebraska.
Dr. Ahmed completed his internship at Hennepin County Medical Center in Minneapolis, Minnesota, and a residency at the University of Minnesota Medical Center, also in Minneapolis. He underwent advanced fellowship training in vascular interventional radiology through the Harvard School of Medicine and Massachusetts General Hospital in Boston, Massachusetts.
Apex Endovascular provides comfortable care using the most progressive techniques to treat peripheral artery disease (PAD), knee pain, pelvic pain, deep vein thrombosis (DVT), spinal compression fractures, and other conditions that cause chronic discomfort or pain.
Dr. Ahmed also works closely with wound care centers throughout the Front Range including Fort Collins, Loveland, Longmont, Greeley, and Denver to perform minimally invasive procedures that restore blood flow, facilitate healing, and prevent amputation in patients with chronic leg wounds. At his previous practice, Dr. Ahmed started a peripheral vascular service that reduced the rate of limb amputations by over 60% in its first year.
Apex Endovascular focuses on increasing patient access to leading-edge interventional vascular treatments. Patients can rely upon the practice for safe, convenient, and affordable care without needing hospitalization or a lengthy recovery period.
Call the office today or book an appointment using the online scheduling feature.
Medical School: University of Cincinnati College of Medicine – Cincinnati, OH
Internship
Internal Medicine: Rush-Presbyterian-St. Luke’s Medical Center – Chicago, IL
Residency
Diagnostic Radiology: Tulane University Medical Center – New Orleans, LA
Fellowship
Neuroradiology/Endovascular Surgical Neuroradiology: Mallinckrodt Institute of Radiology,
Washington University – St. Louis, MO
Board Certifications
American Board of Radiology 1994
Certificate of Added Qualifications in Neuroradiology 1996
Donald Frei, MD, is one of the board-certified neurointerventional surgeons at RIA Neurovascular in Englewood, Colorado.
Dr. Frei earned his Doctor of Medicine at the University of Cincinnati College of Medicine, in Cincinnati, Ohio. He served his internship at Rush-Presbyterian-St. Luke's Medical Center in Chicago, before continuing his training with a diagnostic radiology residency at Tulane University Medical Center in New Orleans.
Dr. Frei went on to complete rigorous fellowship training in neuroradiology / endovascular surgical neuroradiology at Washington University's Mallinckrodt Institute of Radiology in St. Louis. Dr. Frei has also contributed to several articles in peer-reviewed journals. In addition to his certification through the American Board of Radiology, he also has a certificate of added qualifications in neuroradiology.
He provides a wide range of neurointerventional services and has specific interest in the endovascular treatment of acute stroke, intracranial aneurysms, and extracranial revascularization techniques. He also offers minimally invasive procedures, including catheter-directed stroke intervention, angioplasty, stent revascularization, and treatments for cerebral aneurysms and arteriovenous malformations (AVMs).
Caroline Tomas, MD, is a highly skilled and board-certified radiologist at Invision Sally Jobe, where she provides exceptional care to patients in Denver, Colorado. Specializing in abdominal imaging and musculoskeletal radiology, Dr. Tomas offers a comprehensive, patient-centered approach to diagnosing and managing complex medical conditions.
Dr. Tomas earned her medical degree from the Chicago Medical School at Rosalind Franklin University in North Chicago, Illinois. She completed her diagnostic radiology residency at the University of Colorado in Aurora, Colorado, and went on to complete an abdominal imaging fellowship at the prestigious Mallinckrodt Institute of Radiology at Washington University in St. Louis, Missouri.
Additionally, Dr. Tomas has completed mini fellowships in neuroradiology and musculoskeletal imaging, further enhancing her expertise in advanced imaging techniques.
Throughout her career, Dr. Tomas has contributed to medical research, with publications in leading medical journals on topics ranging from vertebral body fractures to Alzheimer’s disease. She has presented her findings at major conferences, including the Radiological Society of North America (RSNA) and the Society of Skeletal Radiology.
Dr. Tomas is an active member of several professional organizations, including the American College of Radiology, the Radiological Society of North America, and the Colorado Radiology Society. She is also a member of the prestigious Alpha Omega Alpha Honor Medical Society, reflecting her commitment to excellent patient care and medical education.
In her free time, Dr. Tomas enjoys hiking, skiing, and spending quality time with family and friends. She is also passionate about cooking and exploring the outdoors.
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
