Hospital Patient Portal ... JCH Medical Group Illini Building. 390 Maple Summit Road Jerseyville, IL 62052 Phone: (618) 498-2101 Fax: (618) 498-8153. Providers. Jon Andersen, DO - General Surgery 618-498-2273; Timothy Ruff, MD - General Surgery 618-498-2273; Jon Anderson, D.O., General Surgery.