Blue Cross Blue Shield of Illinois

Standard filing limit

180 days

Counted from

date of service

Appeal filing limit

Not stated

Appeal window from

Not stated

Notes

BCBSIL participating providers must submit claims within 180 days of the service or discharge date (official provider news).

Provider portal

https://www.bcbsil.com/provider ↗ (opens in a new tab)Copy●Verified · August 2026Verified Aug 18, 2026 · Official web pageView source ↗ (opens in a new tab)

BCBSIL provider portal — claims, eligibility, authorizations, appeals.

Provider Services

800-972-8088Copy●Verified · August 2026Verified Aug 20, 2026 · Official web pageView source ↗ (opens in a new tab)

BCBSIL Provider Telecommunications Center — eligibility/benefits, self-service and claims inquiries (Monday–Friday 8 a.m.–11:30 p.m. CT; Saturday 6 a.m.–3:30 p.m. CT).

Every contact is individually source-tracked and shows the date it was last verified. A green “Verified” badge only appears when a source and verification date exist.

Authorization

Not yet published for this entry. Prior authorization requirements, channels and retro-authorization rules are published only when verified against a source.

Referrals

Not yet published for this entry. Referral requirements and retro-referral rules are published only when verified against a source.

Appeals

Not yet published for this entry. Appeal levels, filing channels and external-review options are published only when verified against a source.

Medical records

Required

Itemized bill

Not stated

Operative report

Not stated

Other required

Routing form (with DCN and key data elements)

Notes

BCBSIL claim review and appeal: appeal requests must include a routing form, relevant claim information, and any supporting medical or clinical documentation. Electronic claim reconsideration requests (preferred) let providers upload supporting documentation and monitor status via Availity Essentials. Physician/clinical peer review takes 30 days and concludes with written notification of the appeal determination.

Common CARCs

1972950

Common RARCs

MA119N29N386M25

Top reasons

Precertification / prior authorization / notification absent (CARC 197) — the payer documents authorization requirements for covered services.; Timely filing (CARC 29) — BCBSIL documents a 180-day claim-filing window from the service or discharge date for participating providers (paired RARC MA119: provider-level adjustment for late claim filing).; Not medically necessary (CARC 50) — BCBSIL documents clinical appeals of adverse determinations for care or services denied based on lack of medical necessity, reviewed by a physician (paired RARCs N386 NCD-based decision, M25 level of service not substantiated, N29 missing documentation).