Complaints or Grievances Any client who has a complaint or grievance can contact the local site administrator or review committee at Angle Intervention Services & IOP. You may contact The Joint Commission by calling their customer service line at: 630-792-5800 You can also send an electronic form here https://www.jointcommission.org/resources/patient-safety-topics/report-a-patient-safety-event/ Or send written complaints to: Office of Quality and Patient Safety The Joint Commission One Renaissance Boulevard Oakbrook Terrace, Illinois 60181