MADISON, Wis. — Gov. Scott Walker plans to sign into law a measure that’s designed to lower health insurance premiums for people buying plans through the Affordable Care Act.

Walker announced Monday that he would sign the bill that had bipartisan support on Tuesday.

Walker’s $200 million plan counts on the federal government covering most of the cost. Where the state could come up with its $50 million to $80 million share would be determined later.

The idea has found broad support among health insurance providers, doctors and the medical community.

Under the bill, the state would be authorized to seek a federal waiver to offer a reinsurance program to lower premium costs. Such a program would cover at least 50 percent of medical claims costing between $50,000 and $200,000.