Adair County Health System welcomes Catherine Hillestad as Chief Executive Officer 05/24/2021 Greenfield, Iowa; May 24, 2021 – Adair County Health System, an affiliate of MercyOne, announces Catherine Hillestad will join as Chief Executive Officer beginning July 7, 2021. A native of Des Moines, Ms. Hillestad brings experience in community and rural health care systems including serving in an interim CEO role at Davis County Hospital in Bloomfield and most recently as Practice Administrator at The Iowa Clinic in Des Moines. “I am excited to join Adair County Health System,” she said. “I look forward to building relationships with everyone at the hospital and in the community of Greenfield. I hope to create a center of excellence for rural health care for people in Adair County.”