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Doctors & Physician Assistants
What Makes Us Different
Doctors & Physician Assistants

Theodore H. Stathos, MD
Dr. Ted Stathos founded RMPGI in 1993. Dr. Stathos is a native of California, and attended Creighton University and the University of Nebraska Medical College in Omaha, Nebraska, graduation in 1988. He completed his pediatric residency training at the University of Arizona Affiliated Hospitals, followed by post doctoral fellowship training in Houston, Texas, at the Baylor College of Medicine in pediatric gastroenterology and nutrition. Dr. Stathos' areas of expertise includes invasive and therapeutic endoscopy and is one of the only pediatric gastroenterologists in the Rocky Mountain region that can perform pediatric biliary endoscopy (ERCP). He has been listed as one of the "Best Doctors in America" since 1999.

Jose M. Barrios, MD
Dr. Jose Barrios completed his residency and fellowship training at Baylor College of Medicine in Houston, Texas. His fellowship training included pediatric nutrition, gastroenterology, and neonatology. Dr. Barrios' areas of clinical interest are gastroesophageal reflux disease, and peptic ulcer disease. His most recent position prior to joining RMPGI was Division director for Pediatric Gastroenterology, at the University of Missouri Hospital in Columbia, Missouri. He is board certified in Pediatrics and Pediatric Gastroenterology.

Sandy Oesterreicher, MD
Dr. Oesterreicher attended the University of Miami School of Medicine and graduated in 1991. She completed her general pediatrics residency at Emory University in Atlanta. She stayed on another year as Chief Resident before starting her training in Pediatric Gastroenterology at Baylor College of Medicine in Houston. After completing her fellowship in 1998, she remained on faculty as assistant professor until August 2005. During this time, she had performed research in the area of intestinal development which was funded by the National Institutes of Health. Dr. Oesterreicher then joined RMPGI in October 2005. She is board certified in Pediatric Gastroenterology.

Chad Best, MD
Dr. Chad Best completed his undergraduate and medical school training at the University of Nevada, Reno and his internship and residency in Pediatrics at the University of New Mexico Children’s Hospital. Dr. Best’s fellowship training in Pediatric Gastroenterology was then completed at the University of Minnesota, where he also obtained a Master’s Degree in Clinical Research. Dr. Best has been recognized for his research in the areas of gastrostomy tube use in patients with cystic fibrosis and esophageal stent placement in children. Dr. Best’s main areas of clinical interest include therapeutic endoscopy, specifically esophageal stent placement, and gastroesophageal reflux testing and management in infants and children. Dr. Best is board-certified in Pediatrics and Pediatric Gastroenterology.

Kyle Kusek, MD
Dr. Kyle Kusek joined Rocky Mountain Pediatric Gastroenterology in August of 2009. Dr. Kusek was born and raised in Longmont Colorado. He completed his medical training at the University of Nebraska, Phoenix Children’s Hospital, and Nationwide Children’s Hospital in Columbus Ohio. Dr. Kusek has extensive training and experience dealing with all different types of pediatric gastrointestinal, liver, and nutritional issues. Dr. Kusek is board-certified in Pediatrics and Pediatric Gastroenterology.

Rachel McPherson, BA, MMS, PA-C
Rachel is a native of Minnesota, where she received her BA from Saint Mary’s University of Minnesota.  While at the University she received a research grant for her thesis in antibacterial resistance of Escherichia coli.  She graduated from the College of Health Sciences at Midwestern University in Glendale, AZ with a Master of Medical Science in Physician Assistant Studies.  Rachel focused on pediatrics during her schooling and training.  During her clinical rotations, Rachel was immersed in general pediatrics, inpatient pediatrics, pediatric surgery, pediatric pulmonology, pediatric hematology/oncology, pediatric gastroenterology, and pediatric emergency medicine.  She joined RMPGI in August 2006.

Katie Cole, MMS, PA-C
Katie was bornand raised in Dubuque, Iowa. She completed her undergraduate degree in biology at Loyola University in Chicago, and also spent time studying abroad in Italy. She graduated from Midwestern University in Glendale, Arizona with a Physician Assistant degree and a Masters of Medical Science. During her program, Katie completed numerous clinical rotations including pediatrics, pediatric gastroenterology, and pediatric orthopedics. She joined RMPGI in October 2007.