you are correct somewhat. A long story short, it's the level of education. A nurse use to be a nurse but not anymore. Level I-III is a certification add on. Where done by state or by job. Some places offer this and some don't but it's getting more popular. A LPN use to be able to start to work and then get iv certified. Some now as the above with RN. "Advance practice LPN..RN I,II,III so on and so on. Take Le Bonheur. Rarely with they hire just a RN I now. Not enough education. Most jobs there in my town don't want to hire no less than BSN.. In my Le Bonheur I work at this is the exact meaning of the above question