Board certified internal medicine physician, Gregory N. Haase, DO joined Kosciusko Medical Group in July 1995. Dr. Haase earned his medical degree from Des Moines School of Osteopathic Medicine in 1981. He completed his internship and residency programs at Detroit Osteopathic Hospital in Southfield, MI in 1985. Dr. Haase is board certified through the American Osteopathic Board of Internal Medicine. Dr. Haase provides full-time internal medicine care at Warsaw Family Medicine.