Like where I work in st.louis were a level 1- Level one is generally a big city hospital and can treat any critical patients. Level 2- can treat the majority of critical patients except they may not have some specialized physicians or ICU's like us in a level 1 there usually located in the suburbs and moderate sized cities, and level 3- is generally a small community hospital or rural hospital it will be able to stabilize and transport critically ill to a level 1 or 2 facility, the major difference is the level 3 and 4 centers dont have the specialist on call that we do in a level 1 or 2 facility.