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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.

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.

Education

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

Internship

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

Residency

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

Fellowship

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

Board Certifications

American Board of Radiology 2015

 

Education

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

Internship

Internal Medicine: Newton Wellesley Hospital – Boston, MA

Residency

Diagnostic Radiology: Virginia Mason Franciscan Health – Seattle, WA

Fellowship

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

Board Certification

American Board of Radiology 2016

 

Dr. Nora Muakkassa is a board-certified ophthalmologist and medical retina specialist. She graduated from Cornell University and earned her medical degree from New York University School of Medicine, where she was elected to the Alpha Omega Alpha honor society. She went on to complete her ophthalmology residency and a fellowship in medical retina at Tufts Medical Center.

Following her training, Dr. Muakkassa joined the faculty at Tufts Medical Center as an assistant professor. During her time there, she led the retina curriculum for ophthalmology residents and contributed to the training of retina fellows. Dr. Muakkassa is the co-founder of OphthoGenie, an educational ophthalmology company she started with her colleague in 2019. She has published several scientific articles and presented her research at national ophthalmology meetings.

Since 2019, Dr. Muakkassa has been dedicated to providing comprehensive ophthalmic care in Colorado, with a special focus on diseases of the retina.

Outside of medicine, she enjoys spending time with her family, hiking, cooking, and gardening.

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.

Floyd Russak, MD, is a double board-certified internist (1984) and holistic medicine (1999) specialist. He specializes in internal medicine, pediatrics, and geriatric care at Russak Personalized Medicine in Greenwood Village, Colorado.

Dr. Russak grew up in Denver and graduated from Cherry Creek High School in 1973.  He earned his bachelor’s degree at Northwestern University in Chicago, studying music and biology.  He then went on to receive his doctorate of medicine at George Washington University in Washington, where he served on the team that treated President Ronald Reagan in 1981. 

Dr. Russak completed his internship and residency training in internal medicine and pediatrics at Harvard Medical School in Boston, where he served on the faculty for 12 years. He was the founder of Somerville Family Health, a 10-physician, four-office multispecialty in Boston, which he sold to Harvard in 1996.  He had numerous television appearances on CBS while in Boston. 

Dr. Russak owned East-West Health Centers from 1999 to 2017 and successfully sold that practice to On Point Medical Group. He has been practicing only personalized concierge medicine since that time

Dr. Russak’s special interests include managing high cholesterol, high blood pressure, diabetics, cardiac/lung problems, and weight loss.  In addition to routine medical care, he is trained to perform minor office surgical and orthopedic procedures such as wart removal, biopsies, and simple fractures. 

Dr. Russak served on the Copper Mountain Ski Patrol and was a singer with the Colorado Symphony Orchestra. He now skis Keystone and Aspen.  He is married with two children, serves on the Board of Delegates of the Colorado Medical Society, is a clinical faculty member at the University of Colorado (CU) Medical School, and is currently the president of the Arapahoe, Douglas and Elbert County Medical Society.

"Patients in my personalized care programs experience 65% fewer hospitalizations than like age counterparts"

Hello! I'm Reagan, and I was born and raised in Michigan.

I attended Loyola University Maryland and majored in Biochemistry. I then returned to Michigan to work as a patient care technician at Origami Brain Rehabilitation Center. That prepared me well to attend medical school at A.T. Still University in Kirksville, MO.

I am passionate about lifestyle medicine and preventative healthcare. I believe good health begins with proper nutrition and regular exercise.

When I'm not caring for patients, you'll find me hiking trails, exploring new restaurants (I’m a self-proclaimed foodie) or enjoying game shows. I'm an avid college basketball and football fan and a classically trained Ballerina.

I was born and raised in Boise, Idaho. From a young age, I was fascinated by innovation and the human experience. Early in life, I assumed a caregiving role for multiple family members, inspiring my pursuit of medicine. During my undergraduate years at the University of Idaho in Moscow, I co-created a viral TED talk titled “A Crash Course in Organic Chemistry” with my mentor, Dr. Jakob Magolan, and worked in a multidisciplinary video game studio with my computer science and genetics professors. 

After graduating with degrees in microbiology, molecular biology, and biotechnology, I went on to the University of Colorado School of Medicine where I served as executive producer on an upcoming documentary, “Diversity and Inclusion in Medicine: The Journey.” 
I’m passionate about nearly every discipline within and outside of medicine, and am eager to begin this residency as an internist at Sky Ridge Hospital. 

In addition to mastering the skills to become an excellent physician, I am committed to finding creative ways to bring comfort and joy to his patients during their most challenging times. 

I’m from Big Spring, Texas. I played volleyball at ASU before going to medical school at Kansas City University Medical School in Joplin, MO. 

I had never heard of Internal Medicine before my third-year rotations, but then fell in love, switched specialties that month, and I now plan to be a hospitalist. 

I had only been to Denver a couple of times before coming here recently, and now I absolutely love it and hope to stay here. I moved here with my boyfriend Casey and our two dogs, Arlo and Pippy. We are looking forward to skiing, hiking, playing video games at home and enjoying all the types of the local sports that Denver offers. We are especially excited about football, as everyone in my family is a huge Broncos fan. I’m hoping that my two sisters and parents will visit frequently!  

Bryce was born and raised in Denham Springs, Louisiana, where he attended college at Louisiana Tech University to play baseball and majored in Biology. He then went to medical school at Louisiana State University’s School of Medicine in Shreveport. In his spare time, he loves being outside in nature, so naturally, Colorado is the place to be! He has really gotten into skiing since living here, and also loves hiking and fishing. He is not quite sure what area of medicine he'd like to specialize in, but he does know that it is very important to him to be in a position that provides excellent care to patients. That's what life is all about - folks taking care of folks!

I was born and raised in Southern California, and I have already had the opportunity to call several states and countries home. I did my undergraduate studies at Brigham Young University in Idaho where I earned a degree in Biology. Then, I started medical school at Trinity School of Medicine on the lovely island of St. Vincent and the Grenadines and finished in the state of Georgia. 

My desire to enter medicine started when I was an Emergency Medical Technician in Idaho. Through my medical school training, I found my passion to be in internal medicine. Outside of my work in medicine, I enjoy playing soccer, outdoor activities with my wife and kids, and fixing things.