Kentucky is among five states that are again suing the Obama administration over its efforts to strengthen discrimination protections for transgender people.
The lawsuit was filed Tuesday in a North Texas federal court. It seeks to block parts of a nondiscrimination mandate of President Barack Obama's health care law.
Opponents of the president’s order say the rules could force doctors to act against their medical judgments or religious convictions.
Transgender rights advocates say the rules simply require doctors to make decisions without bias.
The lawsuit was filed a day after a federal judge in Texas blocked a directive that would have required U.S. public schools to let transgender students use bathrooms consistent with their gender identity.
Wisconsin, Nebraska and Kansas have also joined the latest lawsuit that was initiated by Texas.