Health insurance / United States / separately reported state and District of Columbia markets
Individual insurance2024-2024
- Defs
- 1
- Obs
- 1
- Firms
- 0
- Policy
- 0
- Reports
- 1
Public source dossierPublic datasetKFF
Individual Insurance Market Competition (HHI by state)
State-level HHI leading-insurer share and meaningful-rival measures for the 2024 ACA-regulated individual health insurance market.
This dossier follows one source through the observatory without widening its stated scope.
Evidence topology
Where this source enters the observatory
4/7 direct domains · 103 normalized indicators · 1 market · 2024-2026Encoded row volume · log scaleExact counts shown
Public sourceIndividual Insurance Market Competition (HHI by state)KFF / 5 active routes / 2024-2026
- Record identitykff-individual-insurance-market-2024KFF, 2024
- Source classPublic datasetAccessed Jun 23, 2026
- Encoded scope5 active routes55 direct / 103 indicator rows
- Permitted inferenceTrace + reproduceNo automatic endorsement or comparability
Evidence topology
Where this record enters the observatory
Definitions1market definitionsObservations1market observationsParticipants0Not encodedPolicy records0Not encodedReports2public reportsIndustries0Not encodedGeographies51state rowsIndicators103normalized indicator observations / normalized route
A zero means this source has no encoded row in that evidence domain. It is a boundary in the current observatory release, not a claim that the underlying institution publishes no relevant evidence. Indicator observations are shown as a separate normalized route and are not added to direct-domain totals.
Market context
Markets reached by this source
Measurement releases
Definitions, observations, and participant rows
- Product boundary
- ACA-regulated individual health insurance represented in the KFF competition dataset
- Geographic boundary
- United States for the canonical national profile; states and the District of Columbia remain separately reported jurisdiction screens
- Measurement basis
- 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
Observation
HHI 3,650 / estimated public
No market-size total / high confidence
Participants
No participant rows in this release.
Confidence labels describe the observatory's use of linked measurement and definition rows. They are not grades for the publisher or the source as a whole.
Official record chronology
Policy records backed by this source
No official policy record encoded
This source is not currently attached to an enforcement, inquiry, remedy, settlement, or agency-report event in the public chronology.
Research reuse
Public reports citing this record
Published report
Jul 24, 2026
State Individual Insurance Concentration, 2024
Read reportA source-backed research brief mapping the 2024 KFF state concentration cross-section for the ACA-regulated individual health insurance market, including HHI, leading-insurer share, rival depth, regional variation, and the public evidence needed for stronger competition analysis.
KFF 2024 Individual Insurance Market Competition data for the 50 states and District of Columbia, including source-reported HHI, leading-insurer share, and the count of insurers with more than 5 percent of each jurisdiction's ACA-regulated individual market.
Published report
Jul 19, 2026
The U.S. Competition Landscape
Read reportA national briefing that aligns defined-market signals, industry structure, state and local geographic concentration screens, merger activity, and enforcement records without collapsing their different scopes.
2022 and 2017 U.S. Economic Census industry concentration tables, USDA ERS historical meatpacking CR4, KFF 2024 state individual-market HHI, FDIC 2025 statewide and county Summary of Deposits screens, the FY2025 FTC/DOJ HSR report, and source-backed market and enforcement records.
Industry observatory
NAICS concentration evidence
No NAICS industry rows encoded
This source does not back the Census national industry-concentration tables in the current release. Its other evidence-domain counts remain independently inspectable.
Geographic observatory
Place concentration evidence
- Market universe
- U.S. individual health insurance
- State rows
- 51
- National HHI
- 3,650
- Vintage
- 2024
KFF analysis of Medical Loss Ratio (MLR) Part 1 data from the Health Coverage Portal maintained by Mark Farrah Associates. HHI is the source-reported state-level value for the ACA-regulated individual market; firm-level shares are not re-derived here.
Citation custody
The record behind the rows
KFF, Individual Insurance Market Competition (HHI by state), 2024 ACA individual market.
State-level HHI leading-insurer share and meaningful-rival measures for the 2024 ACA-regulated individual health insurance market.
Canonical source citation
KFF, Individual Insurance Market Competition (HHI by state), 2024 ACA individual market. Available at https://www.kff.org/state-health-policy-data/state-indicator/individual-insurance-market-competition/. Accessed Jun 23, 2026. Antitrust Radar source record kff-individual-insurance-market-2024: https://antitrustradar.org/sources/kff-individual-insurance-market-2024
- Publisher
- KFF
- Access date
- Jun 23, 2026
- License note
- Public research dataset
- Archive
- No archive URL recorded
Source-scoped data packet
Reusable public endpoints
1
Source record
Citation, publisher, access, and license
1
Definitions
Product, geography, denominator, and limits
1
Observations
HHI, market size, status, and methodology
0
Participants
Firm shares, rank, aggregate flags, and custody
0
Official records
Dated enforcement and policy chronology
0
Named edges
Exact organization roles in official records
0
Event windows
Bounded pre, event-year, and post HHI context
103
Indicator observations
Bounded measures carrying this source's custody
2
Reports
Published observatory work citing this source
51
State geography rows
2024 state individual-insurance concentration
Interpretation boundary
Use the source at its encoded scope
A source dossier documents how this observatory uses one public record. It does not endorse every claim in that record, make unlike measures comparable, or extend the source beyond its stated product, geography, population, and vintage.