One Care Resources
Last month I provided information about the Appeals process. This month, I’m giving you a number of programs and their contact information if you want to learn more about One Care or need to call someone if you are having problems with One Care services or benefits. - Burt
One Care: Help and Information
Learn more about One Care services and benefits
Get answers to your questions
Learn how to enroll and dis-enroll
Get help to solve problems
You have several options to learn about One Care and get the help you need.
One Care Ombudsman
The One Care Ombudsman (OCO) office is an independent program. The OCO will answer your questions. Investigate and help you resolve problems. Support you through an Appeals process. OCO services are free.
One Care plans
If you need any help or information, please call the One Care plans’ Member Services phone number:
1-866-610-2273 | TTY: call MassRelay at 711 | 8 a.m. – 8 p.m. | 7 days a week.
1-855-393-3154 | TTY: 1-888-391-5535 | 8 a.m. – 8 p.m. | 7 days a week
MassHealth Customer Service: 1-800-841-2900 | TTY: 1-800-497-4648
Medicare: 1-800-MEDICARE (1-800-633-4227) | TTY: 1-877-486-2048
Medicare Rights Center: 1-888-HMO-9050 (1-888-466-9050)
OCO Promotional Poster - Updated April 2016
OCO Promotional Poster
Having a problem with One Care?
The One Care Ombudsman Office will:
Work to resolve your concerns
Work with you and your plan
Identify your options
Provide information and resources
Contact the One Care Ombudsman for free, confidential help.
Open: Monday to Friday, 9:00 – 4:00 pm
Drop-in Hours: Monday: 1-4 pm and Thursday: 9am-12pm
Toll Free: 1.855.781.9898 (MassRelay – dial 711)
Office: 11 Dartmouth Street, Suite 301, Malden, MA 02148
The OCO office is wheelchair accessible.
Call: 1.855.781.9898 (MassRelay – dial 711) to:
Request OCO informational materials in Spanish (or your preferred language) Braille, large print or electronically (PDF or Word document)
Arrange interpreters in your preferred language and for the Deaf
The One Care Ombudsman Office: Ensuring One Care Works for You!
The One Care Ombudsman Office is not connected with any health insurance company or plan.
One Care Plans