Blue Cross and Blue Shield of Illinois (HCSC)

Source: https://www.bcbsil.com/docs/forms/claim/il/medical-claim-il.pdf

Read date: 10-09-2026

Research steps

1. Complete fillable Claim Form to Pay Insured/Subscriber 228934.1023 and sign and date item 9. Use a separate form for each treatment type. BCBSIL Claim Form
2. Attach the original provider bill. It must show provider name and address, patient name, each service date, description of each service or supply, diagnosis code, and charge for each service or supply. BCBSIL Claim Form
3. Sign in to the BAM Message Center, create a new message, attach the completed form and original provider bill, select Claims Submission Attachments in the subject menu, and select Send. BCBSIL forms FAQ
4. NOT PUBLISHED: accepted file types, size limit, maximum file count, upload confirmation identifier, CMS-1500 acceptance, or electronic-signature acceptance. BCBSIL forms FAQ
5. Submit by the end of the calendar year following the service year under the published consumer rule. Employer and self-funded plan documents can differ. BCBSIL transparency in coverage
6. Check status in BAM or the BCBSIL Mobile App under Claims. BAM claim alerts are also available. NOT PUBLISHED: claim processing time. BCBSIL claims FAQ

Filing facts

• Portal upload: YES
• Portal: Blue Access for Members (BAM) Message Center
• Portal path: Log in to BAM Message Center > create a new message > attach completed claim form and original provider bill > select Claims Submission Attachments > Send
• Mail address: Blue Cross and Blue Shield of Illinois, P.O. Box 660603, Dallas, Texas 75266-0603
• Fax: NOT PUBLISHED
• Attach: Provider name and address; patient name; date each service or supply was provided; description of service or supply; diagnosis code; charge for each service or supply
• File types: NOT PUBLISHED
• File size limit: NOT PUBLISHED
• Maximum files: NOT PUBLISHED
• One file or separate files: Multiple documents: completed form and original provider bill are attached to one message
• Confirmation: Message Center message is sent; reference number or email confirmation NOT PUBLISHED
• Status check: BAM or BCBSIL Mobile App > Claims; BAM claim alerts are available
• Processing time: NOT PUBLISHED
• Member deadline: By the end of the following calendar year
• Deadline basis: Published consumer transparency rule; employer and self-funded benefit booklets can control different terms
• Mental health route: No different public behavioral-health member self-file portal is published

Confirm the address, fax number or portal path on the insurer's own claims page before you send; read on 10-09-2026.