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Contact Us

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

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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
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.

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