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One Care plans

If you join One Care, you will have one plan, one card, and one person to help you with all of your care needs.

There are three One Care plans, Commonwealth Care Alliance, Tufts Health Unify, and UnitedHealthcare Connected. Click on the individual plan links to learn more about each one.

Commonwealth Care Alliance

Commonwealth Care Alliance

One Care Member Materials  I  Find a Provider

Customer Service (April 1 – September 30): M-F, from 8:00am to 8:00pm and Sat. and Sun., from 8:00am to 6:00pm
Customer Service (October 1 – March 31): 7 days a week, from 8:00am to 8:00pm
Phone: 1-866-610-2273 
MassRelay (TRS): 711 (for people who are deaf, hard of hearing, or speech disabled)

Commonwealth Care Alliance Available in the following counties: Barnstable, Berkshire, Bristol, Essex, Franklin, Hampden, Hampshire, Middlesex, Norfolk, Plymouth, Suffolk and Worcester.

Tufts Health Unify

Tufts Health Unify

One Care Member Materials  I  Find a Provider

Customer Service: 7 days a week, from 8 a.m. to 8 p.m.
Phone: 1-855-393-3154
TTY: 1-888-391-5535 (for people who are deaf, hard of hearing, or speech disabled)

Available in the following counties: Middlesex, Suffolk and Worcester.

UnitedHealthcare Connected

UnitedHealthcare Connected

Find a Provider

  • Customer Service Hours: 7 days a week, 8 a.m. 8 p.m. EST
  • Customer Service contact number: 1-866-633-4454 (TTY 711)
  • Available in the following counties: Bristol, Essex (Partial), Franklin, Hampden, Hampshire, Middlesex, Plymouth, Suffolk and Worcester.
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