Under the new rule, physicians must provide the notice in one of three ways:
"The three options are designed to serve a multitude of practice settings, including emergency departments, skilled nursing facilities, and surgical settings," according to Candis Cohen, spokeswoman for the Medical Board.
California is not the only state with a posting requirement for doctors. Texas, Kansas, Georgia, and Idaho are among other states that have similar sign rules.
After more than a year in the regulatory process, the new rule stemmed from concerns by some board members and patient advocates that many patients injured by providers seek remedies through lawsuits without notifying the agency that could discipline physicians for that wrongful conduct.
Once the medical board files accusations against misbehaving doctors, they are posted on the medical board's Web site and may serve as a warning for patients who might choose those practitioners for their care.
Last year, one member of the medical board, Woodside plastic surgeon Mary Lynn Moran, MD, said that such signs are required for cabdrivers.
"It should certainly be expected of physicians to let the public know that they are held to a set of standards and regulated by the state," she said.