In the Rambam's introduction to Mishneh Torah or just thereafter (depending where you consider the introduction to end) he lists his count of the 613 mitzvot twice. First he lists all the positive mitzvot, then all the negative mitzvot. After this he lays out the organization of Mishneh Torah into 14 books (sefer Maddah, Sefer Ahavah, ....) with subcategories (Hilchot Yesodei HaTorah, Hilchot Deot, ....). He lists the mitzvot that will be covered in each of these subcategories. So from this list, we have a full list of the mitzvot the Rambam is including in all of Mishneh Torah.
If he is going to list all the mitzvot in the order he will address them in the balance of his work, what does listing them before that add?