Urgent Care is located in Chicago. Urgent Care is located in Chicago. 29 N Cass Ave., Westmont, IL 60559 ... you will receive a separate email to access your patient portal if you wish as bellow. ... We are located less than five minutes from Hinsdale, IL, Oak brook, IL, Downers Grove, IL, Darien, IL, Elmhurst IL, La Grange, IL, Willowbrook, IL ....