Oksana I. Anand, MD

Dr. Anand became fascinated with Gastroenterology as a specialty as a fourth-year medical student. She felt it was a perfect blend of intellectual stimulation and procedural skill. Her choice was reaffirmed after her father received the diagnosis of metastatic esophageal cancer. After successfully completing Internal Medicine Residency, followed by Gastroenterology and Hepatology Fellowship at the University of Kansas Hospital in Kansas City, KS and prior to joining Rapid City Medical Center in 2016, she worked as a general gastroenterologist in rural Kansas and North Dakota. Although, Dr. Anand cares for patients with all gastrointestinal conditions, her special clinical interest includes diagnosis and management of Celiac disease, Inflammatory Bowel Disease (Crohn's disease and ulcerative colitis), women's GI health (chronic constipation, pelvic floor dysfunction, accidental bowel leakage), colon cancer screening and treatment of clostridium difficile associated diarrhea utilizing pharmacological options and fecal microbiota transplant. In addition to being proficient in general endoscopic procedures such as upper endoscopy (EGD), colonoscopy, and flexible sigmoidoscopy, Dr. Anand is also trained in interpreting wireless capsule endoscopy (PillCam), wireless SmartPill (studies the gut's motility), esophageal manometry and in performance of a non-surgical treatment of hemorrhoids using CRH O'Regan system. Dr. Anand is Board-certified in both Internal Medicine and Gastroenterology and has been a member of the American College of Gastroenterology since 2008. In her practice as a general gastroenterologist, she combines evidence-based principles of western allopathic medicine with functional (integrative) approach in order to achieve optimal, life-long lasting results for her patients. Hippocrates, the Father of Modern Medicine, once said, "All disease begins in the gut." Dr. Anand strongly believes this to be true and has made it her mission to help patients heal their bodies by healing their gut.

Dale R. Bachwich, M.D.

Dale R. Bachwich is a native of Flint, Michigan. He received his degree from the University of Michigan in Ann Arbor in 1984. He completed an Internal Medicine Residency at University of Michigan’s University Hospital in 1987 and stayed there to complete a Fellowship in Gastroenterology and Hepatology in 1990. He became certified by the American Board of Internal Medicine in 1987 and certified in Gastroenterology and Hepatology by the same board in 1990. Dr. Bachwich completed an additional two years of Gastroenterology fellowship training at the Massachusetts General Hospital in Boston.

Dr. Bachwich served on the faculty at Harvard Medical School and then at the University of Pennsylvania prior to joining the Rapid City Medical Center.

Dr. Bachwich practices in all areas of Gastroenterology and Hepatology. He enjoys caring for patients and has a particular interest in patients with inflammatory bowel disease. He also has a strong interest in colorectal cancer prevention and has been a member of the South Dakota Council on Colorectal Cancer.

Dr. Bachwich is a member of the American Gastroenterological Association, the American College of Physicians, the South Dakota State Medical Association and the American Medical Association. Dr. Bachwich and his wife, who is also a physician, have a son and a daughter.

Nathan T. Jaqua, MD

Dr. Nathan T. Jaqua is a native of Sioux Falls, SD. He received his B.S. in Chemistry with a minor in Psychology from South Dakota State University. After completing some graduate level work in Chemistry at SDSU, he attended the University of South Dakota for medical school where he received his M.D. in 2010. Dr. Jaqua completed both his internship and residency in Internal Medicine at Tripler Army Medical Center in Honolulu, Hawaii. This was followed by his fellowship in Gastroenterology at Walter Reed National Military Medical Center in Bethesda, MD. While in fellowship he participated in a phase-2 clinical trial for an investigative medication for eosinophilic esophagitis (EoE) as well as in research on the infectious triggers of Crohn's disease. Dr. Jaqua spent almost 9 years as an active duty Army physician. Dr. Jaqua enjoys practicing general gastroenterology including the treatment of liver diseases, Inflammatory Bowel Disease (Crohn's and Ulcerative Colitis), Barrett's Esophagus, GERD, and Irritable Bowel Syndrome. His passion is preventing colon cancer with screening colonoscopy and the removal of large polyps with endoscopic methods. Dr. Jaqua is a fellow of the American College of Physicians and a member of the American College of Gastroenterology. He is a dual board certified diplomate in Internal Medicine and Gastroenterology by the American Board of Internal Medicine. In his spare time he enjoys hiking, camping, music, and spending time with his wife and three children.

Blake A. Jones, M.D.

Blake A. Jones is a native of St. Paul, MN and grew up in Canada. He attended the University of Western Ontario where he studied chemistry before enrolling at the Faculty of Medicine at the University of Toronto. He obtained his M.D. degree in 1990.

After completing his medical internship at the Toronto General Hospital in 1991, Dr. Jones subsequently entered medical residency at the Mayo Graduate School of Medicine. After practicing with the U.S. Public Health Service-Indian Health Service for one year, he returned to Mayo for a National Institutes of Health fellowship in gastroenterology, and completed his training in 1998./p>

Dr. Jones is a fellow of the Royal College of Physicians and Surgeons of Canada, and certified by the American Board of Internal Medicine in Internal Medicine and Gastroenterology. He is also a member of the American College of Gastroenterology, the American Gastroenterological Association, the American Society for Gastrointestinal Endoscopy, and the Crohn’s and Colitis Foundation of America./p>

Dr. Jones practices general gastroenterology, the diagnosis and management of digestive diseases./p>

In his spare time Dr. Jones enjoys hiking, camping, mountain biking, and spending time with his wife Tracy and their three children./p>

Michael P. McGuire, M.D.

Michael P. McGuire is a native of Montana where he grew up in a ranching family. He received his Bachelor of Arts Degree in biology from Carroll College in Helena, Montana and his MD degree from the University of Washington in Seattle, Washington. His internship and residency in Internal Medicine were completed at USAF Medical Center/Keesler in Biloxi, Mississippi. His Fellowship in gastroenterology was completed at Wilford Hall Medical Center in San Antonio, Texas. He received certification in Internal Medicine from the American Board of Internal Medicine in 1987. Certification in Gastroenterology was earned in 1991 and he was recertified in 2001 and 2012 from the same board. He is a member of the American College of Gastroenterology.

Dr. McGuire practiced general Internal Medicine for two years before going on to specialty training. After training in Gastroenterology, he practiced the specialty for two years at Elmendorf AFB in Alaska. Dr. McGuire devoted nine years of active duty to the Air Force and feels enriched by this experience.

In addition to general Gastroenterology care, Dr. McGuire’s experience and practice involves specialized procedures for the evaluation and treatment of disorders of the pancreas and bile ducts (ERCP). He has practiced in Rapid City, South Dakota since 1993.

Dr. McGuire is married and has five children.

Valerie D. Stephens, M.D.

Valerie D. Stephens, is a native of South Dakota. At an early age her family moved to South West Minnesota where she completed her primary education. She received her BA in Geography at Mankato State University, where she graduated summa cum laude. After 8 years as a cartographer in Minneapolis, Minnesota, she returned to school and obtained her premedical course work primarily at the University of Minnesota. She then returned to South Dakota where she earned her medical degree in 1997.

Dr. Stephens completed her internal medicine internship and residency at Gunderson Lutheran Medical Center in LaCrosse, Wissconsin and her GI fellowship at the University of Minnesota.

During her fellowship, she received specialized training in endoscopic ultrasound, (EUS) at Hennepin County Medical Center in Minneapolis, Minnesota. Prior to joining Rapid City Medical Center, Dr. Stephens practiced gastroenterology in a private setting in Everett, Washington. She was the primary EUS provider for the area and provided services in general gastroenterology. Her main area of interest is GI oncology.

Dr. Stephens is certified as a Diplomat in both Internal Medicine and Gastroenterology by the American Board of Internal Medicine. She is a member of the American Gastroenterological Association and the American Society of Gastrointestinal Endoscopy. Outside of medicine her interests include her pets, hiking, biking, art and music.

Loyal G. Tillotson, M.D., PhD.

Loyal G. Tillotson, a native of northeastern Ohio, received a B.A. degree in Chemistry from Ohio Northern University before earning combined M.D. and Ph.D. degrees from Harvard Medical School. His graduate and postgraduate research centered on the cellular and molecular biology of colon cancer. His postgraduate clinical training included an Internal Medicine Residency at Duke University Medical Center and a Gastroenterology Fellowship at the Massachusetts General Hospital in Boston. Subsequently, he has had faculty appointments at Harvard Medical School and the University of North Carolina at Chapel Hill. Dr. Tillotson is certified as a Diplomat in both Internal Medicine and Gastroenterology by the American Board of Internal Medicine. He is a member of the Christian Medical and Dental Association and serves on the Board of Trustees for John Witherspoon College. He is married and the father of two children. His favorite hobbies involve camping and horses.


Our Mission is to provide compassionate, high quality, efficient care to patients who require the special diagnostic or therapeutic interventions offered at The Endoscopy Center as a part of their comprehensive medical care.




Established in 1998, The Endoscopy Center, Inc. is a physician-owned ambulatory surgery center specializing in endoscopic procedures and located in Rapid City, South Dakota between the Badlands National Park and the Black Hills. Our state-of-the-art facility includes three procedure rooms, an electronic medical record, endoscope tracking, scope drying cabinets, and friendly staff experienced in the field of gastrointestinal endoscopy.
The business is owned and managed by Board Certified Gastroenterologists who are specially trained in the management of diseases of the gastrointestinal tract and liver. All procedures at The Endoscopy Center are performed by Gastroenterologists. They are the specialists who proved the effectiveness of colonoscopy for colon cancer screening.
All physicians, nurse anesthetists, and registered nurses are certified in Advanced Cardiovascular Life Support (ACLS) and all staff are certified in Basic Life Support (BLS). All nursing staff and technicians are members of the Society for Gastrointestinal Nurses and Assistants (SGNA).


The Endoscopy Center is Medicare licensed and certified, accredited by the Accreditation Association for Ambulatory Health Care, and has received recognition by the American Society for Gastrointestinal Endoscopy through their Endoscopy Unit Recognition Program.