Here to Serve You

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. 

Need Help Working with Your One Care Plan?

Call 855.781.9898 or email us  at to get assistance with any of your One Care Plan questions or concerns. We also send occasional updates through our newsletter, so be sure to sign up so you don't miss anything. 


Want to learn more? Explore our helpful One Care resources from MassHealth, Tufts Health Plan Unify, and Commonwealth Care Alliance. Also, be sure to check out our our media press and any past newsletters you have missed.