Question: how do i sign up for masshealth?
Answer: Online. The fastest way to enroll in a health plan is online.
By phone. Call the MassHealth Customer Service Center. We can help. (800) 841-2900. ... 
By mail. Fill out a MassHealth Health Plan Enrollment Form. English. ... 
By fax. You can fax your MassHealth Health Plan Enrollment Form to (617) 988-8903.