Contact Us

Blue Cross and Blue Shield of Illinois
300 East Randolph Street
Chicago, Illinois 60601-5099

Make a Payment

Mail your payment to the address on your premium invoice or learn about other convenient ways to pay your bill.

Product and Program Contact Information

If you are a member with a question about your coverage, please contact Customer Service or a specific department listed on this page:

Individual and Family Plans
Under 65 New Enrollment 866-514-8044
Under 65 Customer Service
(Existing members with health insurance plans including HMO and PPO)
800-538-8833
Medicare Supplement New Enrollment 800-646-3000
Medicare Supplement Customer Service 800-624-1723


Group Plans
For customer service, call the toll free number on the back of your ID card.
HMO Illinois/Blue Advantage HMO
HMO Hotline 800-892-2803
HMO Blue USA (away from home urgent care) 800-810-BLUE (2583)
PPO
PPO Call the toll free number on the back of your ID card
Out-of-Area BlueCard PPO Providers 800-810-BLUE (2583)


Additional Contact Information
Pharmacy Program 800-423-1973
Membership Address

Blue Cross and Blue Shield of Illinois
P.O. Box 3004
Naperville, IL 60566-9747

Claims Address

Blue Cross and Blue Shield of Illinois
P.O. Box 805107
Chicago, IL 60680-4112

Human Resources Inquiries 866-977-7378
Supplier Registration  If you are interested in conducting business with Blue Cross and Blue Shield of Illinois, this link takes you to our Supplier Registration Portal.