Our Providers

Ellen Dy, MD

Dr. Ellen Dy, medical director of the Gastroenterology Center at Valley View, is a board-certified gastroenterologist with 24 years’ experience in practice. Dr. Dy earned her medical degree from Indiana University School of Medicine, with residency at Indiana University Medical Center. She completed her gastroenterology fellowship at University of Texas Medical Branch in Galveston, serving as Chief GI Fellow in 1994-1995.

She then completed an advanced therapeutic endoscopy fellowship at Allegheny General Hospital in Pittsburgh, with advanced training in procedures such as ERCP (Endoscopic Retrograde Cholangio-Pancreatography), palliative biliary drainage and enteral stenting. After fellowship, she practiced in Des Moines, Iowa at Mercy Medical Center for 21 years, serving as the GI Chair for two years before relocating to Colorado. Before joining Valley View in spring 2020, she worked at Alpine Gastroenterology at Glenwood Medical Associates.

Dr. Dy is a member of the American Gastroenterological Association, American College of Gastroenterology, and the American Society of Gastrointestinal Endoscopy.

Brian Scott Berk, MD

Dr. Brian Berk is a board-certified, fellowship-trained gastroenterologist who provides both inpatient and outpatient digestive health care and services. His advanced training and education in liver disease management distinguishes him as a sub-specialist in liver transplant, one of just a handful of physicians in Colorado with this qualification. Other expertise includes advanced hepatology and advanced ERCP (Endoscopic Retrograde Cholangio-Pancreatography).

Dr. Berk’s internship and residency in internal medicine took place at Dartmouth Hitchcock Medical Center, and he underwent his fellowship training in gastroenterology at Oregon Health Sciences University in Portland. He also served on the faculty at University of Pittsburgh and then Dartmouth Hitchcock Medical Center. Ultimately, Dr. Berk yielded his scholarly research and teaching path to his deep commitment and compassionate clinical care to patients. “So many of my patients had no idea what was wrong with them until they met me,” says Dr. Berk. “I learned from my years teaching to focus on educating patients so they understand their disease as well as I do, and to be advocates for themselves.”


Gerard Tomasso, MD

Dr. Tomasso is a board certified gastroenterologist who has practiced in the Glenwood Springs community for over 38 years. He joins the Valley View team part time, as he moves toward retirement. “When I was 15, I worked in a hospital and realized I wanted to be a doctor. I enjoyed working with people and I was good in science. I had a great teacher during my residency who interested me in gastroenterology. Today, I enjoy being on a first-name basis with my patients, and I get good feedback from them.”

Rachel Weaver Conklin, MMS, PA-C

Rachel Weaver Conklin, MMS, PA-C, is an advanced practice provider with the Gastroenterology Center at Valley View. She comes to Valley View most recently from academia, serving as faculty and working in clinical practice at Vanderbilt School of Medicine and its University Medical Center in Nashville.

Along with clinical practice, research and teaching, she has a deep background and training in cancer care and is an enthusiastic advocate for colorectal cancer screenings. “I’m inspired to do my part to make sure we have a strong screening rate in Glenwood and the region. I’m also excited to build a robust outpatient clinical practice, to meet the needs of all GI patients and support the physicians.”

Although Rachel is a new permanent resident of the Roaring Fork Valley, she and husband Dr. David Conklin are very familiar with the area, having regularly visited many of his extended family who live here. Dr. Conklin is new in his role as a psychiatrist at the Glenwood headquarters of Mind Springs Health. The couple are parents to two young children, and in their off time they enjoy hiking, skiing and live music.

Valley View Hospital | 1830 Blake Ave, Suite 202 | Glenwood Springs, CO 81601 | 970.384.7510