Contact Information
The following phone and address information is for Illinois residents enrolled in Blue Cross and Blue Shield of Illinois individual, family, and medicare health insurance plans:
Customer Service
(800) 538-8833
Medicare Supplement and Blue MedicareRx applications
Fax applications to: (847) 220-9280
Mental Health Service
(800) 851-7498
Coverage while Traveling Outside of Illinois
(800) 810-2583
Health Care Provider Inquiry
(800) 972-8088
Claims Mailing Address
Mail claims to:
Blue Cross Blue Shield of Illinois
P.O. Box 3235
Naperville, IL 60566-7235
Fax: (630) 328-4356
Premium Payment Mailing Address
Mail Premium Payments to:
Blue Cross Blue Shield of Illinois
P.O. Box 3240
Naperville, IL 60566-7240
Medicare Supplement Premium Payment Mailing Address
Mail Premium Payments to:
BCBSIL Medicare Supplement Payment Team
Dept. 0038
Palatine, IL 60055-0038
