Cal. Bus. & Prof. Code § 2240
(b) A physician and surgeon who performs a scheduled medical procedure outside of a general acute care hospital, as defined in subdivision (a) of Section 1250 of the Health and Safety Code, that results in the transfer to a hospital or emergency center for medical treatment for a period exceeding 24 hours, of any patient on whom that medical treatment was performed by the physician and surgeon, or by a person acting under the physician and surgeon’s orders or supervision, shall report, in writing, on a form prescribed by the board that occurrence, within 15 days after the occurrence. The form shall contain all of the following information: