Interactive tools
Explore the data hands-on
Free, no-sign-up tools that let you look up insurers and states directly against PlainInsurer's NAIC and CMS data.
- 215
- Insurers searchable
- 30
- States with denial data
- 3
- Live tools
What these tools answer
Two checks cover most insurer due diligence before you buy: is this carrier's complaint record worse than average, and how does claim-denial behavior in your state compare nationally. Both are answerable here, straight from PlainInsurer's NAIC and CMS data.
- 215
- insurers in the lookup
- 30
- states with denial data
- 216
- CMS denial records behind the explorer
Every tool reads live from the National Association of Insurance Commissioners (NAIC) complaint index and CMS marketplace denial-rate dataset, data as of August 2026, no number here is typed in by an editor. See our methodology for the full sourcing detail.
- Complaint Checker Pick your coverage line and insurer to see its NAIC complaint index, rank among peers, and the 4 nearest-complaint carriers. Open tool →
- Denial Rate Explorer Look up any state’s marketplace claim-denial rate and compare it to the national average. Open tool →
- Insurer Rating Lookup Search any insurer for its reputation grade, complaint index, and claim-denial score. Open tool →
What's in the archive
How many of the 209 tracked insurers carry each independently-verifiable data layer
- NAIC complaint index
NAIC complaint index
100 % of insurers
- CMS claim-denial data
CMS claim-denial data
67 % of insurers
- Per-state / per-line breakdown 34
Per-state / per-line breakdown
34 % of insurers
- Medicare Advantage prior-auth 8
Medicare Advantage prior-auth
8 % of insurers
What this shows Every insurer has a base NAIC complaint index, but deeper layers thin out fast: only a third carry a per-state, per-line breakdown, and Medicare Advantage prior-authorization data covers a narrow slice of Medicare-plan carriers specifically. This is what a lookup will actually return, not a promise of universal depth.
Looking for something else?
The full datasets behind these tools are browsable too.
- Browse every insurer with its grade and complaint record. All insurers
- See complaint and denial rankings by line and state. Rankings
- Look up your state’s denial rates and auto costs. By state
Tools run against public NAIC and CMS data. Informational only — not insurance advice.
Download the extracts these tools query: complaint-index.csv and marketplace-denial-rates.csv.