Yes, but not after the deadline designated for this (usually about a week prior to Semester kick-off). These courses must be chosen prior to the start date of the Program and cannot be changed after that date. Before the start date, the courses can be changed as many times as desired - as you assess your needs. (If the Core 101 student does not make a Deep Dive clinical course selection at all, their Clinical Course choices will default to include the following and again cannot be changed after the Program start date: Reversing Metabolic Dysfunction and Adrenal & Thyroid Myths and Truths.)
You will be happy to learn that additional Deep Dive Clinical Courses can be purchased at any time. This is extremely common for students to add topics. Please read here for more information.