Thousands of patients face a reduction in state healthcare benefits through an effort under way this summer to re-evaluate TennCare coverage for 154,000 Tennesseans. Many of them are having their eligibility reviewed for the first time in decades. After a 22-year-old court order was lifted earlier this year, TennCare is now asking a group of people to prove that they are truly worthy of coverage. The group includes thousands of people with chronic medical conditions, including those with severe disabilities and mental illnesses.