California Code, Welfare and Institutions Code - WIC § 14525

(a) The person is 18 years of age or older and has one or more chronic or postacute medical, cognitive, or mental health conditions, and a physician, nurse practitioner, or other health care provider has, within his or her scope of practice, requested adult day health care services for the person.

(b) The person has functional impairments in two or more activities of daily living, instrumental activities of daily living, or one or more of each, and requires assistance or supervision in performing these activities.

(c) The person requires ongoing or intermittent protective supervision, skilled observation, assessment, or intervention by a skilled health or mental health professional to improve, stabilize, maintain, or minimize deterioration of the medical, cognitive, or mental health condition.

(d) The person requires adult day health care services, as defined in Section 14550, that are individualized and planned, including, when necessary, the coordination of formal and informal services outside of the adult day health care program to support the individual and his or her family or caregiver in the living arrangement of his or her choice and to avoid or delay the use of institutional services, including, but not limited to, hospital emergency department services, inpatient acute care hospital services, inpatient mental health services, or placement in a nursing facility or a nursing or intermediate care facility for the developmentally disabled providing continuous nursing care.

(e) Notwithstanding the criteria established in subdivisions (a) to (d), inclusive, of this section, any person who is a resident of an intermediate care facility for the developmentally disabled-habilitative shall be eligible for adult day health care services if that resident has disabilities and a level of functioning that are of such a nature that, without supplemental intervention through adult day health care, placement to a more costly institutional level of care would be likely to occur.