To be considered for acceptance into a doctoral degree program, you are required to have an appropriate academic background as described by the individual Ph.D. program and evidence of a high level of achievement, including GPA in your prior studies.
GRE scores are required for admission to some doctoral programs
The Test of English as a Foreign Language (TOEFL), Duolingo or the International English Language Testing System (IELTS) is required for all international applicants not holding a degree from a United States post-secondary institution. The minimum score required is 79 for the Internet-based TOEFL exam, 213 for the computer-based TOEFL exam, or 550 for the paper-based TOEFL exam. A minimum score of 6.5 with no sub-score lower than 6.0 is required for the IELTS exam or 120 on the Duolingo exam.
Individual academic programs may establish additional or more stringent requirements.