The prize will be announced at 11:45 a.m. at the earliest by Göran K. Hansson, permanent secretary of the Royal Swedish Academy of Sciences.
Last year's prize was awarded jointly to two scientists for their discovery that shows neutrinos - elementary, subatomic particles - have mass.
Following Tuesday's announcement is the Nobel Prize in Chemistry which will be announced on Wednesday.
The Nobel Peace Prize, which will be announced in the Norwegian capital of Oslo, will be revealed on Friday.
The Nobel Prize for Economics will be announced next week on October 10, and the Swedish Academy will announce the prize for literature on October 13.
Laureates traditionally receive their awards at a December 10 banquet in Stockholm, the date on which Alfred Nobel, the prize’s creator and the inventor of dynamite, died in 1896.