Source: Hannibal Regional Healthcare System
Hannibal Regional Healthcare System · posted on its own Express Care page

The hospital says the walk-in clinic inside Walmart on Stardust Drive is closed for construction from Monday, September 28 to Monday, October 5, and that Express Care on the Hannibal Regional campus at 6500 Hospital Drive is open in the meantime. Campus Express Care takes patients of any age; the Walmart clinic normally takes patients 18 months and older.

Details and clinic hours are on the hospital’s page, linked above. In an emergency call 911; the hospital emergency department is (573) 248-5100.