Inpatient Hospital Concentration in California Metros, 2016

Metro Area / 2016 HHI* / Change in HHI since 2012

San Jose-Sunnyvale-Santa Clara, CA / 0.2863 / -0.0125

San Francisco-Oakland-Hayward, CA / 0.2232 / +0.0571

Los Angeles-Long Beach-Anaheim, CA / 0.1634 / +0.0980

San Diego-Carlsbad, CA / 0.3137 / +0.0138

Oxnard-Thousand Oaks-Ventura, CA / 0.2276 / +0.0072

Riverside-San Bernardino-Ontario, CA / 0.0788 / +0.0090

*HHI: Herfindahl-Hirschman Index. A higher HHI value signifies a more highly concentrated market - that is, within a market, a smaller number of hospital systems account for a larger share of hospital admissions. Our HHI measure ranges from 0 to 1, where 0 represents perfect competition and 1 represents a monopoly.
 

Source: Health Cost Institute, Hospital Concentration Index