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Enrollment Information

Joining the IlliniCare Health program is easy. 

You must contact the Illinois Client Enrollment Service (CES) to join. You can do this in two ways:

  1. Go to Illinois Client Enrollment Services’ website  to sign up in the Medicare-Medicaid Plan Program
  2. You can call the Client Enrollment Customer Service Center, from 8 a.m. to 7 p.m. Monday through Friday and a customer service representative will help you. CES Customer Service is 1-877-912-8880; TTY (for people who are deaf, hard of hearing, or speech disabled): 1-866-565-8576.

If you have any questions, call Member Services at 1-877-941-0482. Hours are 8 a.m. to 8 p.m., Monday through Friday. After hours, on weekends and on federal holidays, you may be asked to leave a message. Your call will be returned within the next business day. TTY users call 711.