If the bill becomes law, doctors' offices couldn't tell a patient that all services are covered, if in fact, their care involves providers that don't accept their insurance.
Medical groups that are out of network would be required to tell the patient to contact their insurance company. A hospital would have to do so in writing.
Anthony Wright is from the consumer advocacy group Health Access.
WRIGHT: "This is one of the ways that people go into medical debt and even bankruptcy is by unwittingly building up these charges when they're out of network. And that's why we need this better information and better protection."
The California Medical Association wants the bill to be changed to reduce confusion and administrative burden.
The bill will be heard in Senate Appropriations Committee.