I am a NICU Nurse in Israel and looking for some information about NICU nurses in the USA, preferably California. I know in the USA there are 5 stages of NICU nurses, can someone briefly explain what each of the five stages are? Additionally, I'm about to start a 2 year NICU/ICU specialty course here in Israel, through the ministry of health. It will be instructing and specialising me in everything for the NICU ICU. If I move to California, will I need to retake this course when I arrive? Will I need to retake an exam in the subject matter? Or will it be fully accepted? I know I will need to take the foreign nurse exam NLEX, but I'm specifically asking about this additional specialisation course.