I have an answer for you. I have been here in he USA since 2000 and I have been a RGN since 1983 and an RN here since 2004. Disregard what you have or have not done in your training, if you are a RN you will also be classed as one here. The LPNs have only 10-20 months training only and are no where near RN level. RN's also do a 2 or 3 year course, so yes you are an RN here.
However you cannot just practice, there is quite a road for you. If you do not have an invitation such as your partner's job , as I did, you cannot just come. And although I was here, I went through an advert in the Nursing Times regarding coming to the USA to get all my information. Her name was Althea in Florida I think. You will need an immigration lawyer also, and think about asking for the green card/perminent residency first which allows you to stay for 10 years at a time, rather than just a work visa, unless you use someone like Althea. I did not as we already had one, but she was a great resource.
Firstly you have to go through CGFNS Commission for Foreign Nursing Graduates in Philidelphia. They will have all your nursing school transcripts verified and will determine if you are able to sit the foreign nurses exam, which you must do first before you can even sit a USA exam. Which is 2 papers. As well you have to apply to have yourself checked out by the legal dept, and receive a visa screen certification. But then you have to pass the exam from CGFNS, plus get the visa screening before you may continue. They are slow, allocate at least 6-9 months or you will cry every day!
You must do this before you can apply to take the RN 'NCLEX' exam in the state where you are going to live, the RN license it is not universal, I live in Chicago Illinois but I cannot practice in California or New York. Well I can as I have a license but only for 3 months and only if the institution agrees and I take their exam soon.
And then you cannot register for the RN exam until you are allocated a social security number, this held me up 6 months. And so your lawyer will help speed this up, or if you go through an agency.
I hope tis helps you and does not scare you off.
But everything is private practice here. If you are off sick, it comes out of your annual vacation, yes no one believes me here that in UK you have both. And most places give you 3 weeks AL only including all bank holidays and not until you have been with them for 90 days. Also medical insurance is a must. You should consider $500-2000 per month for a family of 4, and not much less if you are 1 or 2 people. You have to be with a company 90 days before you can have theirs which may be a bit cheaper and they take it out of your wages.
Good luck to you, i will never go home to live now