"A 12-page document reviewed by The Times instructs Allina’s staff on how to cancel appointments for patients with at least $4,500 of unpaid debt. The policy walks through how to lock their electronic health records so that staff cannot schedule future appointments."
Allina Health System in Minnesota Cuts Off Patients With Medical Debt
https://www.nytimes.com/2023/06/01/business/allina-health-hospital-debt.html