California Code, Vehicle Code - VEH § 20003

(a) The driver of any vehicle involved in an accident resulting in injury to or death of any person shall also give his or her name, current residence address, the names and current residence addresses of any occupant of the driver's vehicle injured in the accident, the registration number of the vehicle he or she is driving, and the name and current residence address of the owner to the person struck or the driver or occupants of any vehicle collided with, and shall give the information to any traffic or police officer at the scene of the accident. The driver also shall render to any person injured in the accident reasonable assistance, including transporting, or making arrangements for transporting, any injured person to a physician, surgeon, or hospital for medical or surgical treatment if it is apparent that treatment is necessary or if that transportation is requested by any injured person.

(b) Any driver or injured occupant of a driver's vehicle subject to the provisions of subdivision (a) shall also, upon being requested, exhibit his or her driver's license, if available, or, in the case of an injured occupant, any other available identification, to the person struck or to the driver or occupants of any vehicle collided with, and to any traffic or police officer at the scene of the accident.