Massachusetts Attorney General Maura Healey is suing South Bay Mental Health Center, which operates a mental health facility in Springfield.
Healey says the suit is because of fraudulent billing for the state's Medicaid program for mental health care services provided by what she calls unlicensed, unqualified and unsupervised staff members.
Healey's office says in a statement that MassHealth paid South Bay more than 123-million dollars for outpatient services from August 2009 to the present.