Largest Health Systems
A handful of large systems span the country as regional market leaders. This map colors each state by the large system with the strongest presence there — HCA's red reaches across the South, Kaiser's teal holds the West Coast, Providence and Banner cover the Mountain West, Ascension and Trinity blanket the Midwest, and Sanford Health now anchors the Northern Plains. Gray states have no single national leader.
Market Share Leaders
Kaiser Permanente
HCA Healthcare
CommonSpirit Health
Providence
Ascension
UPMC
Trinity Health
Northwell Health
Mayo Clinic
AdventHealth
Banner Health
Cleveland Clinic
Intermountain Health
SSM Health
Sanford Health
Why market concentration matters
The 15 systems on this map alone operate over 900 hospitals and pull in more than $400 billion a year. When a single system dominates a region, it gains pricing power over insurers, leverage over employers, and bargaining pressure over the very nurses and doctors it employs — the same dynamic this dashboard tracks in executive pay, nursing turnover, and patient affordability.
Gray states aren't untouched — they're often run by strong regional systems (Ochsner in Louisiana, Wellstar in Georgia, Baptist in Arkansas) that simply fall below the national-giant threshold shown here.
Methodology & sources
System selection — The 15 largest U.S. health systems by revenue and hospital count, drawn from American Hospital Association listings, Becker's Hospital Review rankings, and each system's annual report.
State assignment — Each state is colored by the selected system with the strongest presence there (most hospitals / market share), based on publicly reported operating footprints. Where no single national system dominates, the state is shown as Regional / Independent. This is an illustrative footprint map, not a precise market-share measure — several of these systems overlap in the same states (notably Texas, Florida, and California).
Figures — Hospital counts and revenue are approximate (rounded) from most recent public filings; exact numbers shift year to year with mergers and divestitures.
Disclaimer: For educational and informational purposes only. This dashboard aggregates publicly available data from IRS Form 990 filings and third-party sources; figures may be incomplete, estimated, or out of date. Nothing here constitutes legal, financial, tax, or medical advice, or an endorsement or judgment of any organization or individual. Always verify with official filings and qualified professionals before relying on any figure.