After emigrating to the United States in 1889, and, arriving in New York, he studied medicine at the university there. He received his degree from
New York University in 1897. Fishberg has been associated with
Beth Israel Hospital, New York, and was medical examiner of the
United Hebrew Charities of that city. During his time as a medical examiner he recorded
skull and nose measurements of Jewish immigrants through which he originally asserted a genetic difference between Jews and non-Jews to describe them as another race along with
Joseph Jacobs. However, his theories were largely discredited by
Franz Boas through the application of the scientific method. Opposed to the narrow or vertically arranged studies which Maurice Fishberg conducted which completely ignored the
Jewish ethnicity, i.e. culture, religion, and even family in the case of adoptions, Franz Boas looked at all of those factors as well as across multiple generations and in multiple geographic locations to determine there to be no discernible genetic difference between Jews and non-Jews. This, combined with the growth of what
Max J. Kholer called Hitlerism or later
Nazism in Germany, resulted in a national summit where Boas presided as guest of honor. As Maurice Fishberg along with
Ellsworth Huntington discredited their prior works before The Judeans and the Jewish Academy of Sciences on March 4, 1934, Boas emphatically stated that there is no genetic difference between Jew and non-Jew nor any "superior race". Later this discussion was distributed by Congregation B'nai B'rith in Cincinnati, Ohio. == Tuberculosis ==