Supporters of the requirement say it will keep insures from padding their profits at the expense of unsuspecting consumers.
"Millions are benefiting because health insurance companies are spending less money on executive salaries and administrative costs and more on patient care," said Sen. Jay Rockefeller, D-W.Va., a leading advocate of the rebate provision.
White House spokesman Jay Carney said the report shows how Obama's law is "already strengthening the health care system for millions of Americans."
Like everything else about the overhaul, the future of the rebates depends on whether the Supreme Court upholds the law in a decision expected by early summer.
Seventeen states applied for waivers from the 80 percent standard, producing evidence that it would destabilize their private health insurance markets. Federal regulators granted adjustments to seven states, usually meeting each state's request part way.
Data from the nation's most populous state, California, were not ready and thus were not included. Final statistics on the rebates will be issued by the federal government in early summer.
Online: Kaiser report - http://tinyurl.com/d2bcvxy
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