The primary attending health care practitioner shall obtain prior written consent from each patient for whom a billing is requested, authorizing the release of the patient’s billing. A copy of this signed patient consent form shall be forwarded to the health care facility as part of the written request for itemized billings.
Source:
Section 440.40, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=HSC§ionNum=440.40..