The California secretary of state says health care lobbyists spent more than $35 million last year. The biggest health care player was Kaiser Permanente.
Kaiser spent $3.5 million lobbying in California last year.
The insurer doesn't say what measures it was concerned about.
But Jamie Court, with the non-profit Consumer Watchdog, thinks a bill to regulate health insurance rates was a major target.
"Whether it's more regulation of the hospitals, or lowering the cost of health-insurance premiums, Kaiser has an interest in keeping regulators away from their business," Court said.
The California Hospital Association was the state's second-biggest health care lobbyist last year.
Overall statewide, health care groups spent more than any other industry on lobbying in 2011.
