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THOMAS MEISTER, MD
Dr. Meister pursued his undergraduate degree at Creighton University, where he received a Bachelor of Science in Mathematics, before attending the University of Nebraska Medical School in Omaha. Dr. Meister completed his internship and residency training in internal medicine at Thomas Jefferson University Medical Center in Philadelphia, Pennsylvania. He completed one year of his subspecialty training in gastroenterology at Washington University-Barnes Hospital in St. Louis, Missouri, and the remainder at the University of Kentucky Medical Center in Lexington, Kentucky, where he received an academic appointment as an assistant professor of medicine.
Dr. Meister’s area of expertise includes disease of the liver and pancreas, inflammatory bowel disease, capsule endoscopy, endoscopic ultrasound, and advanced endoscopic procedures.
Creighton University, Omaha, NE 1987
Medical School: University of Nebraska School of Medicine 1991
Internship / Residency: Thomas Jefferson University Medical Center, Philadelphia, PA 1991-1994
Gastroenterology Fellowship: Washington University-Barnes Hospital, St. Louis, MO. 1994-1995
Gastroenterology Fellowship: University of Kentucky Medical Center, Lexington, KY 1995-1996
Diplomate of the American Board of Internal Medicine (ABIM)
Diplomate of the ABIM, Subspecialty of Gastroenterology
Healthgrades: Dr. Thomas E. Meister, MD
Kendell Mann, MD
Dr. Mann was raised in Aiea, Hawaii. He earned his undergraduate degree in biochemistry at the University of Rochester in Rochester, New York. Prior to attending medical school, Dr. Mann spent one-year doing graduate research in the Department of Biochemistry at the University of Rochester in Rochester, New York. He returned home to attend medical school at the John A. Burns School of Medicine, the University of Hawaii at Manoa in Honolulu, Hawaii, on a military health profession scholarship.
University of Rochester 1986
John A. Burns School of Medicine, the University of Hawaii at Manoa 1992
Internship and Residency, Internal Medicine, Walter Reed Army Medical Center 1992-1995
Gastroenterology Fellowship, Walter Reed Army Medical Center 2002-2005
Diplomate of the Subspecialty of Gastroenterology/ABIM
Healthgrades: Dr. Kendall Mann, MD
Elena Sidorenko, MD
Dr. Elena Sidorenko, a board-certified gastroenterologist, specializes in gastrointestinal diseases, with an emphasis on general digestive disorders, diarrhea, constipation, inflammatory bowel disease, gastroesophageal disease, diseases of the anorectal area, and gut dysmotility. She offers broad experience in endoscopic procedures with diagnostic and therapeutic implications.
Dr. Sidorenko relocated to Colorado Springs after working as an Associate Professor at Kansas University Medical Center for more than a decade. She completed the Gastroenterology and Hepatology Fellowship and Internal Medicine Residence Program at the University of Kansas, Kansas City. Dr. Sidorenko received her medical degree at Novosibirsk State Medical University and, after receiving additional training in tuberculosis and endoscopic procedures, practiced medicine in her hometown Novosibirsk in Tuberculosis Hospital and Regional Diagnostic Center. Dr. Sidorenko moved to the United States in 1994.
Due to Dr. Sidorenko’s experience in the field of gastrointestinal disease, she has contributed her professional knowledge to the medical community in numerous ways. Dr. Sidorenko has published and presented locally and nationally on the topics of esophageal diseases, including esophageal dysmotility disorders and Barrett’s esophagus, celiac disease, constipation, colorectal cancer, top gastrointestinal issues in women, and irritable bowel syndrome.
During her time at KU, Dr. Sidorenko was part of the GI Motility group performing research in the field of anorectal manometry and esophageal dysmotility disorders. She was active in education, teaching medical students, medicine residents, and GI fellows.
She is a member of the American College of Gastroenterology and the American Neurogastroenterology and Motility Society.
Getting to Know Dr. Sidorenko
Dr. Sidorenko enjoys spending her free time with her family and dogs doing fun things like hiking in the woods, traveling, and reading. She also enjoys gardening.
Diplomate of Gastroenterology since 2005 / ABIM
Healthgrades: Dr. Sidorenko
Katie Hachuela, NP
Katie Hachuela NP began her nursing career in 2008 where she worked in the Medical Surgical ICU in Kettering, Ohio until she moved to Colorado Springs in 2010. She then worked at the Ambulatory Surgery Unit at the Air Force Academy for four years until she completed her Family Nurse Practitioner degree at Regis University in Denver, Colorado, in 2015. She joined our practice after her graduation and has since developed a passion for gastrointestinal health and believes, as did Hippocrates, that “All disease begins in the gut.”
She was introduced to Functional Medicine in 2018 and has attended many post-graduate trainings with the Institute of Functional Medicine through The Cleveland Clinic, The School of Applied Functional Medicine, and The Kalish Institute. She is thankful for her extensive GI knowledge as she believes it is the root cause of many of today’s chronic illnesses.
In 2020, while pregnant with her second child, she experienced her own gastrointestinal symptoms and was ultimately diagnosed with Small Intestinal Bacterial Overgrowth (SIBO) and Ulcerative Colitis (UC). She believes this, although ironic, was a gift for her to truly understand the agony patients can experience when their GI tract is malfunctioning. She is grateful for her Functional Medicine knowledge that has helped her heal her gut.
Katie has been married to her husband Ian for 19 years, who she met while serving in the United States Air Force. She is the mother of two beautiful daughters and enjoys being outdoors, hiking, biking, and practicing yoga.
Denver, CO, 2015
College: Bachelor of Science in Nursing, Wight State University,
Dayton, OH 2008
Register Nurse June 2008
Family Nurse Practitioner May 2015
American Nurses Association
Colorado Nurses Association
Southern Colorado Advanced Practice Nurses Association
Healthgrades: Katie Hachuela, NP
Trish Sanford, ACNP
Trish Sanford, RN, MSN, ACNP-BC joined GACS in October 2012 as a GI Nurse Practitioner. She graduated with her AD-RN in 1982 from Boise State University. She then went on to get a BS in Biology with a minor in Chemistry from the University of Utah.
After working in ICU for ten years, she decided to get a second bachelor’s in Nursing from Delta State University, where she graduated Magna Cum Laude. She went directly into her Masters Degree Program at the University of Tennessee, graduating Magna Cum Laude as an Acute Care NP with a 4.0 GPA. During her Undergraduate Nursing School, she was inducted into the Sigma Theta Tau Honor Society of Nursing and has been a member since 1992.
Undergraduate Nursing, Boise State University 1982
BS: University of Utah 1982-1985
BSN: Delta State University 1994-1996
MSN, ACNP: University of Tennessee, HSC 1998-2001
EMILY LOUNSBURY, NP
Emily Lounsbury is originally from West Virginia but has lived in at least half of the states on the east coast growing up. After spending her early twenties traveling the world she received her BSN at Virginia Commonwealth University in 2009. She has worked on a step down progressive care unit at VCU medical center while getting her masters in nursing in 2011 with her FNP. She has worked in multiple setting including primary care, skilled nursing and in the hospital doing general medicine as well as advanced heart failure and transplant. During this time she spent 2 years in the Peace Corps in Ethiopia as a health educator. She joined GACS in 2018.
Heather Winfield, fNP
Heather Winfield was born in Oklahoma but raised in Gunnison, Colorado. After graduating high school, she moved back to Oklahoma where she began working as a CNA and fell in love with medicine. She eventually went on to become a nurse and obtained her ADN through Rose State College and her BSN through Oklahoma University. She then achieved her goal of becoming a Nurse Practitioner by obtaining her FNP through Simmons University out of Boston Massachusetts. After graduation, she moved closer to home and began working as a provider through a GI group out on the Western Slope of Colorado and has been working in field ever since.