Insurer profile · UnitedHealth Group · NAIC + CMS

UnitedHealthcare of Illinois, Inc.

UnitedHealthcare of Illinois, Inc.'s complaint record, claim-denial rate and reputation grade, drawn from published NAIC complaint data and CMS Transparency in Coverage.

F
Reputation grade
43.1%
Claims denied
1
States (CMS data)

The verdict

UnitedHealthcare of Illinois, Inc. earns a F reputation grade - a significantly worse record than peers, according to CMS Transparency in Coverage filings, 43.1% of its marketplace claims were denied across 1 state.

F
reputation grade
43.1%
claims denied (CMS)
FFF
Reputation grade F (composite score 0.5) - A=Excellent, F=Failing. Based on NAIC complaint ratios and CMS denial data.

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 F · 0.5

GRADE-F · INDEX-UNK · DENIAL-HOT · RANK-UNK · PHOTO-SOLO · LINES-0 · BOOK-MID

  • GRADE-F F · 0.5
  • INDEX-UNK Index blank
  • DENIAL-HOT 43.1% 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. UnitedHealthcare of Illinois, Inc. 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 UnitedHealthcare of Illinois, Inc.

691
appeals filed
271
overturned (reported outcomes)
39.2%
of appeals with a reported outcome

The reported appeals on this profile come from Illinois (691 filed, 271 overturned).

CMS reports an overturn outcome for 691 of these 691 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 UnitedHealthcare of Illinois, Inc.

UnitedHealthcare of Illinois, Inc.'s filing desk summarizes the NAIC complaint record and any CMS marketplace denial data on file.

See where UnitedHealthcare of Illinois, Inc. sits against every reporting carrier in the claim-denial rate ranking. Appeal notes for UnitedHealthcare of Illinois.

Nationwide insurers with similar scores or complaint volume

Two corpus-wide peer sets for UnitedHealthcare of Illinois, Inc.: 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 (0.5 here). Floored at 50+ complaints and 5+ states.

Direct General (Allstate) 0.0 Gainsco Insurance 0.0 Infinity P&C (Kemper) 0.0 Root Insurance 0.0
Aggregates only, not advice. Full terms on the disclaimer.

UnitedHealthcare of Illinois, Inc. is part of the UnitedHealth Group family, alongside UnitedHealthcare, UnitedHealthcare of South Carolina, Inc., UnitedHealthcare of Ohio, Inc., UnitedHealthcare of Texas, Inc., and 2 more in PlainInsurer's dataset -- a shared parent doesn't mean shared performance, so check each subsidiary's own record before assuming they behave alike.

Questions about UnitedHealthcare of Illinois, Inc.

What does UnitedHealthcare of Illinois, Inc.'s grade mean?
UnitedHealthcare of Illinois, Inc. received a grade of F, indicating a significantly worse record than peers.
How many complaints does UnitedHealthcare of Illinois, Inc. have?
NAIC's public bulk data does not include a complaint-volume estimate for UnitedHealthcare of Illinois, Inc. - the carrier may be new, small, or file under a parent company. Absence of an estimate is missing data, not evidence of zero complaints.
How do I file a complaint against UnitedHealthcare of Illinois, Inc.?
File against UnitedHealthcare of Illinois, Inc. through your state's Department of Insurance or the NAIC consumer portal at naic.org.
Is UnitedHealthcare of Illinois, Inc. a good insurance company?
PlainInsurer's F grade for UnitedHealthcare of Illinois, Inc. reflects a significantly worse record than peers relative to peers on published complaint and denial data.
What types of insurance does UnitedHealthcare of Illinois, Inc. offer?
Detailed line-of-business data isn't currently available for UnitedHealthcare of Illinois, Inc.. The carrier is licensed in 0 states.

Source: NAIC published complaint index + CMS Transparency in Coverage PY2025 Complaint index, reputation grade and per-state claim denial rates for UnitedHealthcare of Illinois, Inc. · 2024

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The full PlainInsurer extract, covering every insurer including UnitedHealthcare of Illinois, Inc., is available as CSV and JSON. Underlying federal data is public domain; see our methodology for the compilation and grading method.

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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.