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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"

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.

Samantha “Sammy” Pushchak, PA, is a board-certified physician assistant serving patients at Summit Primary Care in Denver, Colorado. 

Born and raised in Colorado, Sammy is a graduate of Colorado State University in Fort Collins and obtained her Master of Health Science and Physician Assistant Certificate at Lock Haven University in Pennsylvania. 

At Summit Primary Care, Sammy feels very passionately that her patients should have a say in their health care plan and be as involved as possible in the decision-making process. She is extremely bubbly and energetic, and she truly loves her job. Sammy believes the best provider-patient relationship revolves around trust and honesty, and she prioritizes creating a strong bond with her patients.

Outside of her medical practice, Sammy enjoys spending time with her family and friends, being outdoors, traveling, cooking, reading, and watching TV shows and movies. She recently got married and has a dog and cat at home.

Education 

Medical School: Midwestern University, Chicago College of Osteopathic Medicine – Downers Grove, IL

Internship

Internal Medicine: Rush University Medical Center – Chicago, IL

Residency

Diagnostic Radiology: University Hospitals Cleveland Medical Center – Cleveland, OH

Fellowship

Neuroradiology: Barrow Neurological Institute – Phoenix, AZ

Board Certification

American Board of Radiology 2021

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

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

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.

I grew up in northern Virginia and completed my undergraduate studies at the University of Virginia (Go Hoos!) I then went to medical school at the West Virginia School of Osteopathic Medicine where I completed an additional year as a graduate teaching fellow in anatomy. I also spent time as a research assistant for the Exercise is Medicine team, and enjoyed conducting investigations into the anti-inflammatory mechanism of physical activity.

I am delighted to continue my medical training as an internal medicine resident at Sky Ridge Medical Center and as a part of Russak Personalized Medicine. I chose internal medicine so that I can focus on forming lasting relationships with my patients while managing each patient’s comprehensive medical care with an emphasis on wellness. 

In my spare time, I enjoy running, soccer, ultimate frisbee, hiking, traveling, and salsa dancing. My husband and I are thrilled to make the move out to the great state of Colorado as I continue my medical training, and I am looking forward to treating my patients.

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!  

Dr. Beatriz Linn is a board-certified Internal Medicine practitioner with 24 years of experience. Bilingual in English and Spanish, she specializes in preventive care for patients of all ages at Russak Personalized Medicine in Greenwood Village, Colorado. Delivering concierge type care long before it was described that way, Dr. Linn likes to develop close relationships with patients in order to ensure the best health outcomes for each patient.

Dr. Linn grew up in Colombia, South America and knew that she wanted to be a doctor when she was only five years old. In pursuit of this goal, she completed her medical training in Colorado at Presbyterian St. Luke’s Medical Center, where she was recognized as the Resident of the Year.

With a passion for preventive medicine, Dr. Linn works diligently to educate and empower each of her patients, with the goal of preventing illness. She has found success by treating every patient as a daughter, a mother, a father, a sibling or a child, and dedicating the same attention to each patient that she would provide to her own family. Along with providing concierge patient care, she will also be working closely with the residents who work at RPM Family Health and Walk-In.

When she is not working with her patients, Dr. Linn is spending time with her husband and her three sons. She enjoys outdoor activities, including skiing, hiking and bicycling.

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.

Dr. Jordan Walker is a board certified specialist in Internal Medicine. He started his career in biomedical engineering at the University of Utah hospital working on the advanced heart failure team. This team lead him to coauthoring the prestigious United States Bridge to Transplant Trial for the Jarvik 2000 heart pump. His work as an engineer guided him to pursue a career in medicine where he completed medical school and Internal Medicine residency in Colorado. 

Outside of his medical work, Dr. Walker enjoys all sports and spending time with his wife and three sons. When not attending one of sons' games, he can be found working on his pickeball serve or at a driving range attempting to add yards to his golf game. 

I grew up in Sioux Falls, South Dakota and went to college at North Dakota State University where I completed a degree in Zoology and competed in Track and Field. I then went to medical school at the University of North Dakota. 

I enjoy developing relationships with my patients and helping them manage their chronic conditions including obesity, diabetes, high blood pressure, and chronic respiratory diseases. After my residency I plan on pursuing a career in primary care.

In my free time, I spend  time with my family (wife, daughter, and golden retriever) and friends, and also enjoy running, reading, and playing pickleball.