Clinton Memorial Pharmacy - St. Johns Medical Building 901 S. Oakland St. St. Johns, MI 48879. Phone: 989.224.8155. Open 365 days a year: Monday Through Friday 8 a.m. to 9 p.m. Saturday 8 a.m. to 4 p.m. Sunday and Holidays 8 a.m. to 2 p.m. Free prescription delivery in the St. Johns City limits. Expert pharmacists and staff to help you and answer questions.