Bradley ruff, md, and kelly raether, od northwestern medicine grayslake outpatient center 1475 east belvidere road grayslake, illinois 60030 get directions grayslake office hours monday: Northwestern grayslake is also home to 60 physicians in 15 medical specialties. About The Northwestern Medicine Health System Northwestern Medicine 8:00 am to 12:00 pm tuesday: Lake forest hospital grayslake outpatient & acute care center . A modern outpatient center located close to where many of our patients live in the community is a significant improvement in convenience for cancer patients and offers them high quality medical treatments at the new center in grayslake.” northwestern lake forest hospital’s acute care center on the grayslake campus is already open 24 hours a. Lake forest endoscopy center llc (lake forest endoscopy center llc) is a ambulatory surgery center in grayslake, illinois.ambulatory surgery centers (or outpatient surgery centers) are health care facilities where surgic...