Shekhar Challa, MD

Board Certified Gastroenterology,
Board Certified Internal Medicine

Dr. Challa is Board Certified in Gastroenterology and he is also Board Certified in Internal Medicine.  Dr. Challa completed medical school in India and did all his medical training at Coney Island Hospital in Brooklyn, New York.  He has been in private practice since 1987 and was a co-founder of Kansas Medical Clinic in 1998.  Currently serves as President and has been the principle investigator for 17 different clinical research trials. 

Dr. Challa also founded Osteoporosis Services in 1997, the largest mobile bone density testing company in the Midwest which provides services to more than 150 rural hospitals.  Dr. Challa serves as a Board member in several national and international organizations including AMSURG and My Medical Records (Australia).  He is also the award winning author of “Winning the Hepatitis C Battle” and “Spurn the Burn – How to Beat the Heat of Acid Reflux”.

Jerry Feagan, MD

Board Eligible Gastroenterology

Dr. Feagan completed his MD and his gastroenterology fellowship at the University of Kansas.  He has worked as a gastroenterologist in Winfield, Kansas and also with Cotton O’Neil Clinic.  Dr. Feagan went into private practice in 1989, and has been affiliated with Kansas Medical Clinic since 1998.   Dr. Feagan has devoted his energy and skills to the practice of gastroenterology and has special interests in therapeutic ERCP, Barrx esophageal ablation for Barrett’s esophagus, liver biopsy, and hemorrhoidal banding.

John Sun, MD

Board Certified Gastroenterology
Board Certified Internal Medicine

Dr. Sun moved to Topeka after 7 years of experience as a gastroenterologist in San Francisco. During his years of practice, Dr. Sun was awarded the highest patient satisfaction score among 129 GI physicians in Northern California of 99.2% of patients rating him at excellent or better. He also served as Medical Director of the award winning Hepatitis B Program for the Permanente Medical Group. Dr. Sun received his medical training at Harvard Medical School and the Hospital of the University of Pennsylvania.

Jill Powell, PA-C

Ms. Powell completed her BS, Physician Assistant at Wichita State University. She has been working with the gastroenterologists at Kansas Medical Clinic since 2004. She is a member of the American Academy of Physician Assistants and the Kansas Academy of Physician Assistants. Ms. Powell completed her certified Physician Assistant in 2003.

Laura Welborn, APRN-C/NP

Ms. Welborn completed her BS in nursing at Washburn University and her MS in Nursing at the University of Kansas. Prior to working with the physicians at Kansas Medical Clinic she worked as an ARNP in Cardiology at the Cotton O'Neil Clinic. She is also a member of the Kansas State Nurses Association. Ms. Welborn has been with Kansas Medical Clinic with 2001 focusing in the areas of internal medicine and gastroenterology. She completed her certified ARNP in 2000.

Traci Hoffman, APRN-C/NP

Ms. Hoffman completed her Masters of Science in Nursing as an APRN at Washburn University in 2010. She has worked in the areas of physical rehabilitation, and acute care. She also teaches as an Adjunct Clinical Nursing Instructor at Washburn University.  Ms. Hoffman is a member of Sigma Theta Tau International Honor Society of Nursing and Phi Kappa Phi. She was certified as a Nurse Practitioner and joined KMC Gastroenterology in 2011.