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Blue Cross and Blue Shield of Illinois

Illinois • 1000 prefixes

Also known as: BCBSIL, Health Care Service Corporation

Billing reference

Provider phone: (877) 860-2837
Verified Aug 2026 · source
4 exceptions — check before you submit
Depends on the plan type
(800) 972-8382 — FEP Customer Service
(866) 455-8415 — Provider Contact Center - Commercial
Depends on the claim type
(217) 862-5410 — Professional Provider Network Relations
Other departments
(800) 972-8088 — Eligibility and Benefits phone system
Electronic payer ID: 00621
Verified Aug 2026 · source
3 exceptions — check before you submit
Depends on the plan type
MCDIL — Illinois Medicaid / MMAI
66006 — Medicare Advantage
Depends on the product
66012 — Blue Cross Community Health Plans (BCCHP)
Claims mailing address: P.O. Box 660603, Dallas, TX 75266-0603
Verified Aug 2026 · source
1 exception — check before you submit
Depends on the plan type
P.O. Box 3686, Scranton, PA 18505 — Blue Cross Medicare Advantage claims
Timely filing limit: 180 daysCompare all plans
Verified Aug 2026 · source
Prior authorization phone: (800) 654-7385
Provider website: https://www.bcbsil.com/provider

Billing Blue Cross and Blue Shield of Illinois from outside Illinois?

Usually you do not send the claim to Blue Cross and Blue Shield of Illinois. Under the BlueCard program, a provider treating a member from another Blue plan submits the claim to their own local Blue Cross Blue Shield plan, which then routes it to Blue Cross and Blue Shield of Illinois for processing.

The payer ID and claims address above are for filing within Illinois. Filing from elsewhere, use your local plan's details instead.
Prior authorizationis generally handled by the member's home plan — so Blue Cross and Blue Shield of Illinois, wherever you are.
Your timely filing limit is set by your own contract with your local Blue plan, not by the figure above. 365 days is customary but contracts vary.
To check eligibility and benefits for an out-of-area Blue member, call 1-800-676-BLUE (1-800-676-2583).

Arrangements vary by contract, and self-funded (ASO) accounts can differ — confirm with your local Blue plan before filing. See the BlueCard Program Provider Manual for the full rules.

About Blue Cross and Blue Shield of Illinois

State's only statewide customer-owned health insurer and independent licensee of the Blue Cross Blue Shield Association. Serves Illinois with commercial, Medicare, Medicaid and other plans.

Blue Cross and Blue Shield of Illinois

Billing reference

Billing Blue Cross and Blue Shield of Illinois from outside Illinois?

About Blue Cross and Blue Shield of Illinois

All 1000 prefixes for Blue Cross and Blue Shield of Illinois