Our Providers
William J. Salyers, Jr., MD, MPH, FACP
Professor and Chair, Department of Internal Medicine
Program Director – Internal Medicine Residency
Division Chief – Gastroenterology
University of Kansas School of Medicine – Wichita
Nathan Tofteland, MD
Associate Professor, Departments of Internal Medicine and Pediatrics
Program Director – Gastroenterology Fellowship
Division Director – Internal Medicine/Pediatrics
Division – Gastroenterology
University of Kansas School of Medicine – Wichita
Kyle Rowe, MD
Assistant Professor, Department of Internal Medicine
Associate Program Director – Gastroenterology Fellowship
Division – Gastroenterology
University of Kansas School of Medicine-Wichita
Sarah Rooker, DNP, APRN
Sarah Rooker, DNP, APRN is a board-certified nurse practitioner by the American Association of Nurse Practitioners.
Andrew Osbeck, PA-C, MPA
Andrew Osbeck, PA-C is a board certified Physician Assistant. He earned his Master of Physician Assistant degree from Wichita State University in 2006. He has 10 years of clinical Gastroenterology experience and joined Dr. Salyers at KU-Wichita Gastroenterology in February of 2013.
Cynthia Jantzen, APRN
Cynthia Jantzen, APRN-C is a board certified Nurse Practitioner. She earned her Bachelor of Science in Nursing from Bethel College and her Masters in Nursing from Wichita State University. She joined Dr. Tofteland at KU-Wichita Gastroenterology in April of 2016.
Daly Al-Hadeethi, MD (Fellow)
Daly Al-Hadeethi, MD is a Gastroenterology fellow. She earned her medical degree from Al-Nahrain University College of Medicine in Baghdad, Iraq and graduated residency in Internal Medicine at the University of Kansas School of Medicine-Wichita.
Stephanie Melquist, MD (Fellow)
Stephanie Melquist, MD is a Gastroenterology fellow. She earned her medical degree from Trinity School of Medicine in the Caribbean and graduated residency in Internal Medicine at the University of North Dakota School of Medicine and Health Sciences.
Rahul Shekhar, MD (Fellow)
Rahul Shekhar, MD is a Gastroenterology fellow. He earned his medical degree from Government Medical College Nagpur in India and graduated residency in Internal Medicine at the University of Missouri-Columbia.
Kevin Singh, MD (Fellow)
Kevin Singh, MD is a Gastroenterology fellow. He earned his medical degree from St. George’s University School of Medicine in Grenada, West Indies and graduated in Internal Medicine at Woodhull Medical and Mental Health Center in New York.