First Stop for Outpatient Testing Services and Hospital Admissions. Samaritan Medical Center is proud to unveil a new centralized registration area at the main hospital in Watertown. This newly renovated space will be the first stop for patients reporting to the hospital for some of the most utilized testing services. Featuring a dedicated entrance just outside the hospital's free parking garage, this new area brings several of the hospital's outpatient testing services together in one convenient, easy-to-find location. Please see our new Registration brochure and map to Registration area.