California Code, Health and Safety Code - HSC § 1400

(a) It is unlawful for any person, association, or corporation to establish, conduct or maintain a referral agency or to refer any person for remuneration to any extended care, skilled nursing home or intermediate care facility or a distinct part of a facility providing extended care, skilled nursing home care, or intermediate care, without first having obtained a written license therefor as provided in this chapter from the director or from an inspection service approved by the director pursuant to Section 1257.

(b) It is unlawful for any person, association, or corporation to establish, conduct, or maintain a referral agency or to refer any person for remuneration to any person or agency outside a long-term health care facility, as defined in Section 1418, for professional services for which the long-term health care facility does not employ a qualified professional person to furnish a specific service, including, but not limited to, laboratory, diagnostic, or therapy services, unless the long-term health care facility complies with current federal and state laws regarding the provision of these services and all of the following conditions are met: