The One Care Ombudsman (OCO) is an independent office that helps individuals, including their significant others and representatives, address concerns or conflicts that may interfere with their enrollment in One Care or their access to One Care health benefits and services. 

Information for one care members

Doctor and deaf patient talking 


Helpful One Care resources from MassHealth, Tufts Health Plan Unify, and Commonwealth Care Alliance.  


Need help working with your One Care Plan? 

Call 855.781.9898 or email