MedMark Treatment Centers Springdale is a dedicated addiction treatment center located at 1607 S Old Missouri Rd, Springdale, AR 72764. We offer comprehensive support and services to individuals seeking recovery from addiction. Our facility is open Monday through Friday from 5:30 AM to 11 AM and Saturday from 7:15 AM to 10 AM. For more information, visit our website at medmark.com or contact us at +14793339472.