BOSTON — In the largest settlement of its kind, a private equity firm and former executives of South Bay Mental Health Center, Inc. have agreed to pay $25 million for allegedly causing fraudulent claims to be submitted to the state’s Medicaid Program, known as MassHealth, for mental health care services provided to patients by unlicensed, unqualified, and improperly supervised staff members at clinics across the state, according to the Massachusetts District Attorney’s office.

SBMHC has operated 17 mental health facilities across the state that included locations in Pittsfield and Springfield.

This settlement is the largest publicly disclosed government health care fraud settlement in the nation involving private equity oversight of health care providers, as well as the largest amount a private equity company itself has agreed to pay to resolve fraud allegations involving health care portfolio companies. It is also the biggest Massachusetts-only Medicaid Fraud settlement.