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If you are a member of media with questions, please contact:

Colleen Miller at 312-653-6904

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

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

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
If you have coverage through your employer, call the toll-free number on the back of your ID card.
Under 65 New Enrollment	866-514-8044 Monday – Friday: 8 a.m. – 8 p.m. CT Saturday: 8 a.m. – 6 p.m. CT Sunday: 10 a.m. – 2 p.m. CT
Under 65 Customer Service (Existing members with health insurance plans including HMO and PPO)	800-538-8833 Monday – Friday: 7 a.m. – 8 p.m. CT Saturday: 8 a.m. – 5 p.m. CT Sunday: Closed
Medicare Supplement New Enrollment	800-646-3000
Medicare Supplement Customer Service	877-384-9297

Group Plans
For customer service, call the toll free number on the back of your ID card.
HMO Illinois/Blue Advantage HMO
HMO	Call the toll free number on the back of your ID card
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.