Going by the links below, it looks like this term might (strangely) be linked to a class action suit! According to
https://www.azahcccs.gov/AHCCCS/HealthcareAdvocacy/arnoldvsa... "A class action suit—Arnold v. Sarn—was filed in 1981 against the State of Arizona alleging that the Arizona Department of Health Services/Division of Behavioral Health Services (ADHS) and Maricopa County did not provide a comprehensive community mental health system as required by statute." In the FAQs, "A member is someone who is: at least 18 years of age, has been medically determined to have a serious mental illness, and lives in Maricopa County."
According to this
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.386... "A class member under Arnold vs. ADHS is a resident of Maricopa
County, indigent, has a serious mental illness, and would reasonably
benefit from appropriate behavioral health treatment due to his or her
mental illness"
It gave birth to the Arizona Vision in Phil's link. More here -
https://crh.arizona.edu/sites/default/files/pdf/2011_RuralBe...