(CNN) -- In a move aimed at boosting mental health treatment, Health and Human Services Secretary Kathleen Sebelius on Friday announced new rules that will put teeth in a 2008 mental health equity law.
The Mental Health Parity and Addiction Equity Act, signed by President George W. Bush, requires doctors and insurers to treat mental illness the same as physical illness.
Sebelius made the announcement to applause at the Rosalynn Carter Symposium on Mental Health Policy in Atlanta.
On paper, the law made mental health more accessible, but there has been virtually no enforcement of it, said Dr. Jeffrey Lieberman, president of the American Psychiatric Association and a Columbia University psychiatrist.
"Up to now, the law has not been complied with," Lieberman said. "Companies have only sort of adhered to it."
Insurance companies often cover mental illness in a more limited fashion than physical illness.
"Many private insurers gave nothing. Some provided benefits, but they were limited and inadequate," Lieberman said. The law, the new rules and provisions of Obamacare combined will ensure mental and physical illness would be covered similarly.
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For example, insurance companies can no longer authorize a 30-day hospital stay for a stroke and only a two-day stay in the hospital for someone who has had a psychotic break.
In addition, people with pre-existing mental conditions like attention deficit hyperactivity disorder or depression will no longer be denied insurance coverage -- and under Obamacare, a mental illness diagnosis will no longer trigger a potential loss of coverage.
The "incredibly important law, combined with the Affordable Care Act, will expand and protect behavioral health benefits for more than 62 million Americans," Sebelius said. "People who either have insurance coverage now and have no mental health coverage or where the Affordable Care Act fills in those gaps for people who have no insurance at all, they will be able to access affordable care."
She called it "the largest expansion of behavioral health benefits in a generation."
Now that the final rules have been announced, Lieberman argues there needs to be "more transparency and means of enforcement. Or how do you know private insurers will comply?"
Friday's announcement applies to private insurance. The rules do not apply to people on Medicaid because the Obama administration has already given states guidance on how those plans should be meeting requirements set out by the 2008 law.
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The Georgia setting for Sebelius' announcement seems particularly appropriate as an acknowledgement of former first lady Rosalynn Carter's long efforts to destigmatize mental illness.
Carter is the author of a handful of books on the topic, and the Mental Health Systems Act was passed in 1980 in large part due to her advocacy. The law provided more funding for community-based care and created a system of prevention services and an advocate system for those who struggle with mental illness.
That law also had a parity provision that was never enforced, Sebelius said Carter had told her. "Finally, in 2013, we are achieving this," she said.