All Walk-In Clinic Patients are asked to call 406.488.3963 for an G) appointment before arriving. Same Day Appointments WEEKDAYS ZAM - 6:30PM SATURDAY 9AM - 12PM Services provides through the Primary Care Clinic. Use the main Clinic Entrance on 14th Ave SW in Sidney and check in with the clinic receptionist. SIDNEY HEALTH CENTER CLINIC E08997 All Walk-In Clinic Patients are asked to call 406.488.3963 for an G) appointment before arriving. Same Day Appointments WEEKDAYS ZAM - 6:30PM SATURDAY 9AM - 12PM Services provides through the Primary Care Clinic. Use the main Clinic Entrance on 14th Ave SW in Sidney and check in with the clinic receptionist. SIDNEY HEALTH CENTER CLINIC E08997