Illinois
Blue Cross and Blue Shield of Illinois
General Inquiries
1-312-653-6000
Blue Cross and Blue Shield of Illinois
300 E. Randolph Street
Chicago, IL 60601-5099
300 E. Randolph Street
Chicago, IL 60601-5099
FEP Service
4002 Loop 322
Abilene, TX 79602
4002 Loop 322
Abilene, TX 79602
Claims/Customer Service
Blue Cross and Blue Shield of Illinois
P.O. Box 660603
Dallas, TX 75266-0603
P.O. Box 660603
Dallas, TX 75266-0603
Customer Service
Precertification
Mental Health/Substance Use Disorder Precertification
Case Management
Disease/Care Management Programs
Asthma
Chronic Obstructive Pulmonary Disease
Congestive Heart Failure
Coronary Artery Disease
Diabetes
Congestive Heart Failure
Coronary Artery Disease
Diabetes
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