Insurer profile · NAIC + CMS
Blue Cross Blue Shield of Illinois
Blue Cross Blue Shield of Illinois's complaint record, claim-denial rate and reputation grade, drawn from published NAIC complaint data and CMS Transparency in Coverage.
- C
- Reputation grade
- 21.1%
- Claims denied
- 1
- States (CMS data)
The verdict
Blue Cross Blue Shield of Illinois earns a C reputation grade - a record near the industry median, according to CMS Transparency in Coverage filings, 21.1% of its marketplace claims were denied across 1 state.
- C
- reputation grade
- 21.1%
- claims denied (CMS)
Graded on 1 of 3 measures: claim denials. The score is rescaled across the measures available, so it is not directly comparable with a carrier graded on more of them.
How we calculated this grade →NAIC CIS filing desk
NAIC NAIC C · 49.2
GRADE-C · INDEX-UNK · DENIAL-ELEV · RANK-UNK · PHOTO-SOLO · LINES-0 · BOOK-MID
- GRADE-C C · 49.2
- INDEX-UNK Index blank
- DENIAL-ELEV 21.1% denied
- RANK-UNK Rank pending
- PHOTO-SOLO No peer gap
- LINES-0 No lines
- BOOK-MID 3/7 fields
Instrument codes from this carrier’s NAIC Consumer Information Source filing: grade band, complaint index, CMS denial band, corpus rank, photo-finish peer, line book, and field completeness. Not an official NAIC rating.
These claim figures are from plan year 2025, not 2026. Blue Cross Blue Shield of Illinois does not appear in the CMS Transparency in Coverage file for plan year 2026, so the most recent figures CMS has published for this insurer are the ones shown here. Illinois carriers left that file when the state moved to its own health-insurance marketplace for 2026; other insurers stop appearing when they exit the individual marketplace. The numbers below are unchanged and still describe the period they cover. They are simply not current-year, and are excluded from every national and state average on this site. See our methodology.
CMS marketplace filing
Reported appeal outcomes for Blue Cross Blue Shield of Illinois
The reported appeals on this profile come from Illinois (2,232 filed, 694 overturned).
CMS reports an overturn outcome for 2,232 of these 2,232 filed appeals; missing outcomes are excluded from the percentage. These filing totals are not a prediction for an individual appeal. View the CMS source ↗
What the NAIC filing desk shows for Blue Cross Blue Shield of Illinois
Blue Cross Blue Shield of Illinois's filing desk summarizes the NAIC complaint record and any CMS marketplace denial data on file.
See where Blue Cross Blue Shield of Illinois sits against every reporting carrier in the claim-denial rate ranking. Appeal notes for Blue Cross Blue Shield of Illinois.
Nationwide insurers with similar scores or complaint volume
Two corpus-wide peer sets for Blue Cross Blue Shield of Illinois: nearest national-scale carriers by composite score and by NAIC complaint volume. These are cross-market neighborhoods, not the corporate-family list or same-grade chips above.
Similar composite score
Nearest carriers by composite score (49.2 here). Floored at 50+ complaints and 5+ states.
Questions about Blue Cross Blue Shield of Illinois
What does Blue Cross Blue Shield of Illinois's grade mean?
How many complaints does Blue Cross Blue Shield of Illinois have?
How do I file a complaint against Blue Cross Blue Shield of Illinois?
Is Blue Cross Blue Shield of Illinois a good insurance company?
What types of insurance does Blue Cross Blue Shield of Illinois offer?
Source: NAIC published complaint index + CMS Transparency in Coverage PY2025 Complaint index, reputation grade and per-state claim denial rates for Blue Cross Blue Shield of Illinois · 2024
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The full PlainInsurer extract, covering every insurer including Blue Cross Blue Shield of Illinois, is available as CSV and JSON. Underlying federal data is public domain; see our methodology for the compilation and grading method.
Data: NAIC published complaint index (2024) · CMS Transparency in Coverage PUF PY2025. Not affiliated with NAIC or CMS.
Every figure on PlainInsurer comes directly from NAIC MCAS and CMS Transparency in Coverage data; no editor types in numbers. See our editorial standards or methodology, or report an error. Data current as of 2026-08-11. Grades measure only the published complaint/denial data; we don't recommend any insurer or policy.