Memorial Hospital Chester, IL ER Convenient Care. Hospital Details: Patient Portal.Sign-Up. Pay Bill On-Line. Memorial Hospital. 1900 State Street.Chester, IL 62233. 618-826-4581.Chester Clinic. 2319 Old Plank Road 833 Lehmen Drive.Chester, IL 62233 618.826.4588.Memorial Hospital of Chester is proud to announce that we have been ranked a HCAHPS 5 Star, Above Average, hospital by our patients ....