Ready to Enroll in One Care? - Commonwealth Care Alliance
Commonwealth Care Alliance

Ready to Enroll in One Care?

Request a call today – we're here to help.

Enrolling is easy!

To enroll, call MassHealth Customer Service Center at 800-841-2900, Monday through Friday, 8:00 a.m. – 5:00 p.m. (TTY: 800-497-4648).

Before you call MassHealth, you may want to download and complete the One Care Enrollment Decision Form*. Having it filled out in advance will speed up your enrollment. 

Need more information?

If you have any questions about benefits or the enrollment process, let's talk!

You can:

Call us at 866-610-2273 (TTY 711), 8 am to 8 pm,
7 days a week.

Ask us to call you. To request a call, fill out
the form below.

Preferred time to be reached:


At no point will Commonwealth Care Alliance sell, trade, or lease any information collected on our site. The information provided will be used to contact you, provide you with information, or help you enroll. If you pay a premium to MassHealth for CommonHealth, you must continue to pay the premium to MassHealth to keep your coverage. Benefits, formulary, pharmacy network, and provider network may change January 1 of each year.

To view the PDF files above, you may need to download a free copy of Adobe® Acrobat Reader* software on your computer. *When you click this link, you will leave our website.

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If you have any questions, call us:
(TTY 711),
8 am to 8 pm, 7 days a week