Health Departments Narrow search by: Keyword: Results Found: 2 View On Map new search Sort by: A-Z Print Marion County Health Department 3105 Palmyra Rd. Hannibal, MO 63401 (573) 221-1166 Encore Healthcare Services, LLC 2800 St Mary's Ave Suite B Hannibal, Missouri 63401-3779 (573) 603-1062