The Doctorate of Medicine and of Philosophy (MD–PhD) is a dual doctoral degree for physician–scientists, combining the professional training of the Doctor of Medicine degree with the research expertise of the Doctor of Philosophy degree; the Ph.D. is the most advanced credential in the United States. Other dual degree programs exist, such as the joint MD–JD degree; both the JD professional degree and the MD are not universally recognized internationally, however. The National Institutes of Health currently provides 50 medical schools with Medical Scientist Training Program grants that support the training of students in MD–PhD programs at these institutions through tuition and stipend allowances. These programs are often competitive, with some admitting as few as two students per academic year. The MCAT score and GPA of MD–PhD matriculants are often higher than MD only matriculants. Application and admissions MD–PhD typically require or prefer candidates who have had a background in research, either under a professor as an undergraduate or have taken at least one gap year to work in a laboratory setting. The application process in addition to a personal statement required for MD-only applications also require two additional essays to describe why an applicant wants to pursue an MD–PhD and an essay describing their research background. Training programs In the United States, MD–PhD degrees can be obtained through dual-degree programs offered at some medical schools. The idea for an integrated training program began at Case Western Reserve University School of Medicine in 1956 and quickly spread to other research medical schools. In 1964, through the Chief of the Office of Program Planning and Evaluation Herbert H. Rosenberg, Ph.D., the National Institutes of Health (NIH) developed a grant to underwrite some universities' MD–PhD programs. This funding was distributed through the Medical Scientist Training Program (MSTP). There are also non-MSTP funded dual-degree programs, which typically provide funding through endowment funds, research assistantships, teaching assistantships, and extramural fellowships). Non-MSTP funded dual degree programs have more flexibility and can extend to degrees other than the PhD (e.g., JD and MBA degrees). Admission to a dual degree program is not a requirement to receive MD and PhD degrees. An individual has the option to complete each degree separately through single-degree programs. However, the student is responsible for all medical school tuition and does not receive a stipend during their MD education. Furthermore, since the PhD training is not streamlined with the medical training, students