First lawsuit filed against Kentucky’s Medicaid work rules. The health care of thousands is at risk.

Kentucky Gov. Matt Bevin (R) upended the state’s Medicaid program two weeks ago by imposing work requirements, premiums, and other administrative changes on some enrollees. Changes to the half-century program will move 95,000 people off Medicaid coverage, state officials said. Advocates warned early on there would be lawsuits, and on Wednesday, the first one came.

The Southern Poverty Law Center, National Health Law Program, and Kentucky Equal Justice Center filed the class ac...