Geographic evidence lab
State comparison studio
Compare state concentration measures within one product and geographic framework. Selected jurisdictions retain their periods, sources, and interpretation limits.
Comparable here
Every row is a 2024 state observation for the same ACA-regulated individual health insurance market, published through one KFF methodology.
Boundary still matters
These measures screen one insurance market. They do not rank state economies, employer coverage, consumer welfare, or legal liability.
Selection console
Choose two to four jurisdictions
Every selection retains the same individual-insurance market, KFF source, 2024 vintage, and metric definitions.
4 Census regions represented.
Selected
44 regionsHigh HHI
4At or above 2,500Majority leaders
1Largest insurer at 50%+Thin rivalry
3Three or fewer above 5%Comparable state field
Market HHI across selected states
Bars share the 51-jurisdiction observed range. The benchmark marker is the published U.S. value.
Pressure lead: South Dakota at 3,396. U.S. benchmark: 3,650.
Active state dossier
New Mexico
Highly concentratedWest rank #6 on the higher-pressure ordering.
NM
3,222National rank #30U.S. benchmark
3,650-428 state deltaWest avg
3,523-301 state deltaBenchmark matrix
Published measures and national deltas
Ranks follow pressure direction: higher HHI and leader share rank first, while fewer meaningful rivals rank first.
| Jurisdiction | Region | Market HHI | Largest insurer share | Insurers above 5% share | Profile |
|---|---|---|---|---|---|
| New MexicoNM / Highly concentrated | West | 3,222#30 / -428 vs U.S. | 48%#25 / 0% vs U.S. | 5#36 / +1 vs U.S. | Open |
| North CarolinaNC / Highly concentrated | South | 3,255#29 / -395 vs U.S. | 43%#29 / -5% vs U.S. | 3#11 / -1 vs U.S. | Open |
| New JerseyNJ / Highly concentrated | Northeast | 3,387#28 / -263 vs U.S. | 50%#21 / +2% vs U.S. | 3#11 / -1 vs U.S. | Open |
| South DakotaSD / Highly concentrated | Midwest | 3,396#27 / -254 vs U.S. | 40%#35 / -8% vs U.S. | 3#11 / -1 vs U.S. | Open |
Evidence contract
One market, one source, one vintage
- Market
- U.S. individual health insurance
- Coverage
- 51 jurisdictions / 2024
- Publisher
- KFF
- Selected packet
- NM / NC / NJ / SD
This geography layer describes the ACA-regulated individual health insurance market using KFF's 2024 state-level measures. It does not measure a state's overall economy, employer-sponsored insurance, or a legal market definition.