Charles Stewart To Lead Sparks Health System, Summit Medical Center by Arkansas Business Staff Posted 9/16/2013 12:00 am Updated 5 years 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 articles older than 15 days. Articles newer than 15 days are not included in this offer. Purchase Now Already have archive access? Login to view this article.