Advocate Health Care, the Chicago area's largest provider of medical care, has reached an agreement on providing free and discounted medical care to uninsured patients as part of a class action lawsuit it has been battling. Under the settlement, which an Advocate spokeswoman said still has to be approved by a Cook County Circuit Court judge, the hospital operator would provide charity care assistance to individuals earning up to 400% of the federal poverty level or $82,500 for a family of four. Advocate operates eight hospitals in the Chicago area.