William P. Tillis, MD

Dr. William Tillis is a pulmonologist who earned his medical degree from the University of Illinois College of Medicine in Chicago. He completed his residency training at the University of Arkansas for Medical Sciences and additional residency work at the University of Texas at San Antonio, followed by a fellowship in pulmonary diseases at the University of Texas at San Antonio in 1993. With four decades of medical practice, Dr. Tillis holds board certification in internal medicine from the American Board of Internal Medicine and communicates with patients in English.

Dr. Tillis practices at OSF Saint Francis Medical Center and sees patients in Janesville and Lake Geneva, Wisconsin. He specializes in treating chronic lung disease, interstitial lung disease, and COPD with related health conditions. His expertise includes performing pulmonary function testing and bronchodilator reversibility testing to evaluate lung health. Patients rate Dr. Tillis 5.0 out of 5 stars for his care.