Mental health services across Wales should be overseen by a single body to plan and deliver mental health provision, including hospital and community-based services and social services, says a report for ministers.
The concept of an "integrated mental health and well-being service for Wales" was put forward in a report by Professor Michael Williams, vice chair of Abertawe Bro Morgannwg University trust.
He suggested a body managed by a national board appointed by the health minister and supported by at least three regional boards.
It would work closely with GPs, housing, education and leisure services and commission services from the private and voluntary sectors.
"The service needs to unite primary care, community mental health services, social services and acute services in a common code and purpose to provide service users with care that is seamless," says the report.
The body would lead on a new public mental health programme.
Health minister Edwina Hart said the report was "a discussion document that is really starting debate about where we need to go" and she would ask NHS organisations and patients what they thought of the idea.
But she questioned whether creating a single organisation was the only way to improve services.
"Is a simple administrative solution the answer? It never can be, can it?" she said.