Therefore, mental health parity -– also known as parity and mental health insurance parity -– has become a movement for equal health insurance rights. It is spearheaded by advocacy groups, particularly the National Alliance on Mental Illness (NAMI), and has been a topic of political discussion and debate for over a decade. Provisional bills have been passed as well as many revisions and iterations of related legislation and many states have enacted their own laws.
In October 2008, the Paul Wellstone and Pete Domenici Mental Health Parity and Addiction Equity Act of 2008 was enacted into law by President Bush.

