Welcome Dr. Shanker Das Kundumadam and Dr. Nathalie Pena to Mercy's GASTROENTEROLOGY CLINIC Shanker Das Kundumadam, MD MERCY Now accepting new and transferring patients, call (319) 369-4542 or visit, mercycare.org/GI GASTROENTEROLOGY CLINIC Nathalie Pena, MD Welcome Dr. Shanker Das Kundumadam and Dr. Nathalie Pena to Mercy's GASTROENTEROLOGY CLINIC Shanker Das Kundumadam , MD MERCY Now accepting new and transferring patients , call ( 319 ) 369-4542 or visit , mercycare.org/GI GASTROENTEROLOGY CLINIC Nathalie Pena , MD