• South Office (303) 778-6527
  • North Office (303) 388-7265
  • West Office (303) 778-6527

Meet our Team Physicians You Can Trust

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Myles S. Guber, M.D.

Dr. Myles Guber has extensive experience in complex mitral valve repair surgery and has performed “small incision” mitral and aortic valve surgery for many years. Robotic surgery was a natural extension of his previous surgical experience. His extensive experience encompasses all aspects of adult cardiac and thoracic surgery.

Dr. Guber received both his undergraduate and medical degrees from Northwestern University in Chicago, Ill. He trained in general surgery at Louisiana State University and completed his cardiac surgical training at University of Southern California, Good Samaritan Hospital in Los Angeles.

Dr. Guber was recently selected as a Castle Connelly Top Doctor in the field of Thoracic and Cardiac Surgery after being nominated by his peers as an outstanding physician.

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Bradley O. Hofer, M.D.

Dr. Bradley Hofer has special interest, training, and teaching experience in minimally invasive, beating heart, off pump, percutaneous, small incision, and port access Cardiac and Thoracic surgery.

His publications and presentations include discussions and techniques concerning complex aortic and mitral valve repair, bloodless cardiac surgery, off pump coronary artery bypass, electrophysiology, pacemakers, defibrillators, aortic aneurysm and dissection, lung disease and cancer, and esophageal disease.Dr. Hofer received his Bachelor of Science degree from the University of Washington and Medical Degree from Northwestern University. His Residency and Fellowship training include General Surgery at Virginia Mason Hospital in Seattle, Esophageal and Thoracic Fellowship in the United Kingdom, and Cardiac and Thoracic Surgery at Louisiana State University and the University of Washington.

After completing training in 1990 he remained in Academics at the University of Washington Medical Center teaching Cardiac and Thoracic Surgery until 2000 when he joined Colorado CV Surgical Associates. Dr. Hofer enjoys boating, skiing, biking, as well as traveling.

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Sanjay P. Tripathi, M.D.

Dr. Sanjay Tripathi attended medical school in India. After completing his first internship he came to the US for his residency in General Surgery in Pennsylvania. He completed his thoracic surgery residency at the University of Illinois at Chicago. Most recently he was the medical director of the Robotic and Minimally invasive cardiothoracic and vascular surgery program at St. Francis Hospital in Topeka, Kansas.

Dr. Tripathi joins CCVSA with vast experience in all aspects of cardiothoracic surgery. He has a special interest in Robotic procedures such as mitral and tricuspid valve repair, cryomaze for atrial fibrillation, and excisions. He is board certified.

With his recent move to Colorado, Dr. Tripathi looks forward to exploring all the state has to offer with his wife and two children.

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Colleen S. Hupp, D.O.

Dr. Colleen Hupp attended medical school at the University of Health Sciences in Missouri.  She completed her General Surgery Residency at the University of Kansas followed by her Vascular Surgery Fellowship at the University of Missouri. Dr. Hupp was Assistant Professor at the University of Kansas Medical Center for three years where she enjoyed working with medical students and residents as they progressed through their training.  She also has always been extremely  interested in mentoring and encouraging women interested in a career in surgery.

In 2015, Dr. Hupp moved back to her home state and joined CCVSA.

In her spare time, Dr. Hupp enjoys spending time with her husband and children and is an avid equestrian.

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Eric S. Weinstein, M.D.

Dr. Eric Weinstein received his Bachelor Awards Degree from Dickinson College in Carlisle, Pennsylvania. Upon graduation, he enrolled in Medical School at the State University of New York at Buffalo where he received his MD Degree. Dr. Weinstein completed a General Surgery Residency at Case Western Reserve University in Cleveland, Ohio and then went on to extend his training with a vascular fellowship at the University of California in San Francisco.

Dr. Weinstein is Board Certified in both General and Vascular Surgery. He was Associated Professor of Surgery and Chief of Vascular Surgery at the University of New Mexico from 1989 to 1996 before joining Denver Vascular Surgical Associates. That group merged with Colorado Cardiovascular Surgical Associates in 2000.Dr. Weinstein is a member of the Society for Vascular Surgery as well as the Western Vascular Surgical Society and is a past President of the Rocky Mountain Vascular Surgical Society. He has received extensive endovascular training for New Emerging Vascular Therapies most recently having completed a two-month Endovascular Fellowship in Hawaii.

Dr. Weinstein has numerous publications in the Vascular and Endovascular Literature. He is involved in all aspects of vascular disease and has a special interest in the treatment of abdominal aortic aneurysms, stroke prevention and endovascular therapies. He, along with other members of his group, has been recognized as a top Vascular Surgeon in the 5280 Magazine.

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Michael A. Cooper, M.D.

Dr. Michael Cooper grew up in Nebraska and graduated from Nebraska Wesleyan University. He received his medical degree from the University of Nebraska. He completed his residency in Kansas and his fellowship in Peripheral Vascular Surgery at Louisiana State University.

In 1992 he moved to Colorado and joined a successful vascular practice and then came to CCVSA in 2000. Dr. Cooper has done extensive research and has many publications in regards to peripheral vascular surgery. He has also been recognized as Top Doctor by 5280 Magazine several years in a row. He is a dedicated husband and father to three beautiful daughters.

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Marcus R. Kret, M.D.

Dr. Marcus Kret is Colorado native and a graduate of the University of Colorado – Boulder. He attended the Chicago Medical School at Rosalind Franklin University of Medicine and Science in Chicago, IL where he was elected to the Alpha Omega Alpha Honor Medical Society. Following medical school, Dr. Kret received his General Surgery training at Oregon Health and Science University in Portland, OR. During this time, he also completed a one-year research fellowship in vascular surgery that led to several peer-reviewed publications.

Dr. Kret completed his clinical fellowship in Vascular and Endovascular Surgery at Stanford University, where he gained extensive experience in complex endovascular repair of thoracic and abdominal aortic aneurysms, including the the use of branched and fenestrated technology. In addition, he received training in both open and endovascular therapies for carotid and lower extremity arterial disease, dialysis access creation and maintenance, as well as endovenous ablation for varicose veins.

When not treating patients, Dr. Kret enjoys spending time with his wife and two young children, Cooper and Madeleine. He is an avid skier and is excited to introduce his family to the year-round outdoor activities that abound in Colorado.

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Jess K. Joymon, M.D.

Dr. Jess Joymon was born and raised in New York. He received his undergraduate degree in Computer Science from New York University after which he received both his Medical Degree and Masters Degree in Public Health from New York Medical College.

Dr. Joymon went on to complete his residency in General Surgery at Morristown Medical Center in New Jersey, a Mount Sinai Hospital affiliate. While at Morristown Medical Center he received the Surgery Chairman’s Award for his high ideals, compassion, and leadership style as well as a Humanitarian Award for his caring and compassionate approach to patient care with a genuine respect for people. After residency, he went to Texas Heart Institute/Baylor College of Medicine, the pioneers of cardiac surgery in the world, for his Cardiothoracic Surgery training.

During his time at Texas Heart Institute, he learned an array of techniques for performing open heart procedures of all types, including coronary artery bypass grafting as well as mitral valve and aortic valve repairs and replacements; he also received extensive training in the treatment of diseases of the aorta, both utilizing open and endovascular techniques. Dr. Joymon also has expertise in thoracic surgery to treat diseases of the lungs, trachea, esophagus, and mediastinum; part of his experience in thoracic oncology comes from MD Anderson Cancer Center in Houston, TX.

When Dr. Joymon is not occupied with his patients, he likes to explore all the beauty Colorado has to offer with his wife and two young sons.

Physician Assistants

Michael Berke PA
Greg Engelken PA-C
Ashley McNamara PA
Sarah Schoonover PA