Successful candidates score within the 80-120 range on the ibT (550-677 on the paper version). You must be able to read, speak and write English fluently, as well as be able to take notes and understand hour-long lectures. If English is not your native language, you are required to take the Test of English as a Foreign Language (TOEFL), even if you are a U.S. citizen.
Alternatively, you may submit an IELTS (International English Language Testing System) score. The minimum required score is 6.5.
Information on test dates and locations can be obtained by visiting the TOEFL website.