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With 24 years of experience, Dr. Igor Borisov is a board-certified internal medicine specialist at Ninth Avenue Internal Medicine in Denver. Dr. Borisov earned his medical degree from Vilnius University Medical School and completed his residency in internal medicine at Good Samaritan Hospital in Cincinnati. 

As an internal medicine physician, Dr. Borisov treats patients with a variety of acute and chronic health conditions, such as hypertension, asthma, diabetes, depression and more. Dr. Borisov gives each patient the time and premium care they deserve, catching and treating diseases early before they become serious. He also works with patients to find up-to-date treatment plans that they’re comfortable with and that address their unique needs. 

Dr. Borisov combines top-notch education with years of experience to make each patient visit unforgettable. He also speaks fluent Lithuanian, and he’s currently accepting new patients.

Daniel Witten, MD, FACP is a board-certified internal medicine physician at Ninth Avenue Internal Medicine in Denver, with over 23 years of professional experience. Dr. Witten graduated cum laude from Vilnius University Medical School and completed his internal medicine internship at the State University of New York and internal medicine and primary care residency at the University of Colorado Health Science Center in Denver. He practiced at Rose Medical Center and founded the Ninth Avenue Internal Medicine Practice in 2003. 

For the compassionate, premium care Dr. Witten provides to every patient, Denver Magazine has awarded him a “Five Star Doctor” rating. He has also received the Vitals.com Patients' Choice Award and has worked as an NBA physician for the Denver Nuggets. Dr. Witten has actively participated with the local medical charity Operation Walk Denver and traveled with the medical charities to Nicaragua, Panama, Peru, Guatemala, Honduras and across Latin and Central America. American College of Physicians awarded Dr. Witten with the Fellows rank, one of their highest academic recognition. Dr. Witten serves on the Board of Denver Medical Society and to Rose Medical Hospital Pharmaceuticals and Nutrition Committee. 

Diabetes, hypertension, migraines, thyroid disorders, high cholesterol, heart disease, various digestive disorders, attention deficit disorder, depression, anxiety and neurological conditions are just some of the health conditions Dr. Witten is uniquely qualified to treat. He always recommends the least invasive, most innovative treatment first, uses cost saving technology and medications and catches disease symptoms early before serious health problems arise. Patients enjoy his humor and friendly bedside approach. 

In his free time, Dr. Witten enjoys the Argentine tango, skiing, traveling and spending time with his son. He is also fluent in Lithuanian and is currently accepting new patients.

Ida Rastegar graduated from Yale University and earned her M.D. at Emory University in Atlanta. She completed her residency in obstetrics and gynecology and went on to join the faculty at UCLA for several years. After moving to Boulder, CO with her husband and three children, she took on the role of office manager for Rinnova. She is excited about some of the newer treatments at Rinnova such as Cellfina cellulite treatment and Halo. With her experience in OB/GYN she is thrilled to introduce patients to the newest vaginal rejuvenation treatment offered, diVa. When she is not at Rinnova, she spends time with her children and her Yorkie, Nutmeg. She loves yoga, cooking, and exploring new restaurants around town.

Medical School: University of Minnesota Medical School – Minneapolis, MN

Internal Medicine: Gundersen Lutheran – La Crosse, WI

Diagnostic Radiology: Mayo Clinic – Rochester, MN

Interventional Radiology: Johns Hopkins Medicine – Baltimore, MD

American Board of Radiology 2018

Allen Swanson, MD, works as a vascular and interventional radiologist at RIA Endovascular. Dr. Swanson sees patients at the office in Windsor, Colorado.

As a college student, Dr. Swanson became interested in the link between mind and body after taking courses in genetics and psychology. He completed premed courses and a degree in psychology at Northwestern University in Evanston, Illinois. He attended the University of Minnesota Medical School, where he studied radiology and graduated with his medical degree. 

Dr. Swanson completed an internship in internal medicine at Gundersen Lutheran in La Crosse, Wisconsin, and a diagnostic radiology residency at the Mayo Clinic in Rochester, Minneapolis. He then did a fellowship in interventional radiology at Johns Hopkins Medicine of Baltimore, Maryland.

Board certified by the American Board of Radiology, Dr. Swanson has co-authored and published articles on current radiology techniques, global practice, and humanitarian teleradiology.

At RIA Endovascular, Dr. Swanson utilizes his background in imaging to perform minimally invasive procedures. His techniques avoid many risks of surgery and are an option for patients who can’t have surgery. He collaborates with other physicians, nurses, and technicians to maintain a high standard of patient care.

Dr. Swanson travels for international medical volunteering and spends time with his family in the beauty of Colorado’s natural parks.

Medical School: Pennsylvania State University College of Medicine – Hershey, PA

Internal Medicine: Pennsylvania State University College of Medicine – Hershey, PA

Milton S. Hershey Medical Center – Hershey, PA

Interventional Radiology: Mayo Clinic Hospital – Jacksonville, FL

Ray Bradford, MD, is a board-certified vascular and interventional radiologist in Northern Colorado. Dr. Bradford sees patients at RIA Endovascular in Windsor, Colorado.

He pursued medical school at the Pennsylvania State University College of Medicine in Hershey, Pennsylvania, followed by an internship in Internal Medicine also at the Pennsylvania State University College of Medicine, and his residency at Milton S. Hershey Medical Center also in Hershey.

He completed his fellowship in Interventional Radiology at the Mayo Clinic Hospital in Jacksonville, Florida.

Dr. Bradford has contributed to many presentations and publications, including:

• Choudhary AK, Bradford RK, Dias MS, Moore GJ, Boal DK. “Spinal subdural hemorrhage in abusive head trauma: a retrospective study.” Radiology 2012 Jan;262(1):216-23. doi: 10.1148/radiol.11102390 PMID: 22069156
• Bradford RK, Tulchinksky M. “Subcutaneous injection of Tc-99m pertechnetate for neonatal thyroid scintigraphy.” Clin Nucl Med. 2013 Dec;38(12):1015-8. doi: 10.1097/RLU/ 0000000000000251
• Choudhary AK, Thamburaj KT, Bradford RK, Dias M, Boal D. “Venous injury in abusive head trauma.” Pediatr Radiology. Provisionally Accepted 4/7/15. Accepted for publication on 5/29/2015
• Handbook of Radioembolization, Chapter 3, Treatment planning. Part I: Vascular considerations associated with safety and efficacy in radioembolization. RAY BRADFORD AND MARK J. MCKINNEY. Taylor and Francis Publishing 2016. ISBN 9781498742016

At present, Dr. Bradford is devoted to providing all his patients with high-quality, compassionate, and individualized care at RIA Endovascular.

Pradeep Raj Rai, MD, FASAM, is a board-certified medical doctor and a Fellow of the American Society of Medicine. He is the medical director at Magnolia Medical Group, with locations in Denver and Wheat Ridge, Colorado, and he is board-certified in addiction medicine to offer the highest-quality care to every patient he sees.

Dr. Rai received his bachelor’s degree in cellular and molecular biology from Tulane University in New Orleans, Louisiana, before going on to earn his medical degree. After working for several years in the field of addiction medicine, he founded Magnolia Medical Group to provide the residents of Colorado with resources for addiction that combine behavioral health solutions alongside effective medical care.

Dr. Rai has experience in the many forms of addiction medicine and an unceasing dedication to making a positive impact on the lives of his clients and their families.

He welcomes anyone in need of help to Magnolia Medical Group, where they can expect comprehensive, nonjudgmental treatment in a safe and compassionate environment.

Medical School: Tufts University School of Medicine – Boston, MA

Internal Medicine: Newton Wellesley Hospital – Boston, MA

Diagnostic Radiology: Virginia Mason Franciscan Health – Seattle, WA

Abdominal Imaging & Intervention: Brigham & Women’s Hospital – Boston, MA

American Board of Radiology 2016

Medical School: University of Texas Medical School at Houston, Houston,TX

Internal Medicine: Texas A&M University Health Science Center – Scott & White Hospital, Temple, TX

Diagnostic Radiology: University of Texas Health Science Center at Houston, Houston, TX

Cardiothoracic Radiology: National Jewish Health/University of Colorado, Denver, CO

American Board of Radiology 2015

The Center for Multisystem Disease in Denver specializes in disorders that affect multiple body systems. These diseases often cause such complex symptoms that patients spend years going from one doctor to the next, without ever obtaining an accurate diagnosis because their problem doesn’t fit neatly into a traditional medical specialty.

Jill Schofield, MD founded the Center for Multisystem Disease to provide comprehensive care to patients with conditions such as dysautonomia, mast cell activation syndrome, antiphospholipid syndrome, Sjögren’s syndrome, and celiac disease.  Some of the patients suffering from these disorders also have Ehlers-Danlos syndrome which causes additional struggles. She specializes in immune-mediated disorders that are confounding due to bodywide symptoms, devoting extra time to each patient so she can identify the issues causing their symptoms. She was the recipient of the 2019 Dysautonomia Support Network’s Game Changer Award for her work in the use of IVIG to treat patients with autoimmune forms of dysautonomia.

At the Center for Multisystem Disease, you’ll receive compassionate care that includes not just medication, but support for lifestyle changes that are important for many patients suffering from these disorders. This includes dietary counseling, help with stress reduction, and learning the best ways to exercise to maintain well-being without aggravating your condition.

If you’ve ever felt like no one understands your illness, or worse, if you’ve been told there’s nothing wrong with you or your symptoms are all in your head, you’re not alone. You’ll find a community that welcomes you at the Center for Multisystem Disease. You’ll meet other patients who suffer from the same condition and who understand your struggle.

Your symptoms will never be discounted at the Center for Multisystem Disease. Their goal is to define your underlying disorder or disorders and to provide customized treatment targeted to the root of the problem, rather than just “band-aid” treatments targeted to each symptom. If you have questions or would like to schedule an appointment, call the office or book an intake appointment online.