California Code, Health and Safety Code - HSC § 1262.4

(a) No hospital, as defined in subdivisions (a), (b), and (f) of Section 1250, may cause the transfer of homeless patients from one county to another county for the purpose of receiving supportive services from a social services agency, health care service provider, or nonprofit social services provider within the other county, without prior notification to, and authorization from, the social services agency, health care service provider, or nonprofit social services provider.

(b) For purposes of this section, “homeless patient” means an individual who lacks a fixed and regular nighttime residence, or who has a primary nighttime residence that is a supervised publicly or privately operated shelter designed to provide temporary living accommodations, or who is residing in a public or private place that was not designed to provide temporary living accommodations or to be used as a sleeping accommodation for human beings.