{"license":"https://creativecommons.org/licenses/by/4.0/","dataset":"definitions","count":1,"filters":{"source":"kff-individual-insurance-market-2024","sourceMatched":true,"sourceId":"kff-individual-insurance-market-2024","sourceTitle":"Individual Insurance Market Competition (HHI by state)","sourcePublisher":"KFF","sourceProfileHref":"/sources/kff-individual-insurance-market-2024"},"rows":[{"id":"def-individual-insurance","marketId":"mkt-individual-insurance","productBoundary":"ACA-regulated individual health insurance represented in the KFF competition dataset","geographicBoundary":"United States for the canonical national profile; states and the District of Columbia remain separately reported jurisdiction screens","measurementBasis":"KFF source-reported HHI, leading-insurer share, and count of insurers above 5 percent","denominator":"Enrollment represented in KFF's 2024 ACA-regulated individual-market analysis","included":"The national HHI anchor and complete 51-jurisdiction state concentration cross-section","excluded":"Employer-sponsored insurance, Medicare, Medicaid, other insurance products, insurer identities and common control, and any causal or legal conclusion","metricFamily":"source_reported_hhi","definitionStatus":"source_defined","crossMarketUse":"screen_only","timeSeriesUse":"snapshot_only","sourceId":"kff-individual-insurance-market-2024","dataYear":2024,"confidenceLevel":"high","methodologyNote":"Publish the source-reported national HHI as the market-profile anchor and retain every jurisdiction row in the linked state atlas with the KFF methodology note.","limitations":"This is a one-year cross-section of a source-defined insurance market. Jurisdiction measures do not identify insurers, establish competitive effects, or extend to other insurance products.","marketSlug":"us-aca-individual-health-insurance","marketName":"U.S. ACA individual health insurance","marketShortName":"Individual insurance","sector":"Health insurance","geography":"United States / separately reported state and District of Columbia markets","marketNaicsCode":"524114","industryHref":"/industries/524114","crosswalkHref":"/markets/economy?bridgeMarket=us-aca-individual-health-insurance&bridgeNaics=524114#market-industry-crosswalk","sourceTitle":"Individual Insurance Market Competition (HHI by state)","sourcePublisher":"KFF","sourceUrl":"https://www.kff.org/state-health-policy-data/state-indicator/individual-insurance-market-competition/","sourceAccessDate":"2026-06-23","sourceProfileHref":"/sources/kff-individual-insurance-market-2024"}]}