Charles Stewart To Lead Sparks Health System, Summit Medical Center by Arkansas Business Staff Posted 9/16/2013 12:00 am Updated 1 year ago Charles Stewart will oversee the two Health Management Associates hospitals in Arkansas, Sparks Health System and Summit Medical Center. Want the Full Article? Get Unlimited Archive Access for $19.95 per Year Readers must pay to access stories older than 20 days. Purchase Now Already have archive access? Login to view this article.