After Hours, Acute, scheduled appointments are available. Please call in advance. Available appointments for the After Hours Clinic are currently limited. If you need to reach the After Hours Clinic, please call CHI Health Clinic Missouri Valley at 712-642-2794.CHI Health Missouri Valley Clinic - After Hours is dedicated to delivering high quality, compassionate care to Missouri Valley and nearby communities. Visit us at 809 E Elm St or call (712) 642-2794 for more information.