Cal. Ins. Code § 10752.1

A stop-loss insurer shall not exclude any employee or dependent on the basis of an actual or expected health status-related factor. Health status-related factors include, but are not limited to, any of the following: health status; medical condition, including both physical and mental illnesses; claims experience; medical history; receipt of health care; genetic information; disability; evidence of insurability, including conditions arising out of acts of domestic violence of the employee or dependent; or any other health status-related factor as determined by the department.