California Code, Health and Safety Code - HSC § 120250

All physicians, nurses, clergymen, attendants, owners, proprietors, managers, employees, and persons living with, or visiting any sick person, in any hotel, lodginghouse, house, building, office, structure, or other place where any person is ill of any infectious, contagious, or communicable disease, shall promptly report that fact to the health officer, together with the name of the person, if known, the place where he or she is confined, and the nature of the disease, if known.