Therapeutic Hemp Medical Access Act of 2017 This bill amends the Controlled Substances Act (CSA): to add definitions for the terms "cannabidiol," "cannabidiol-rich plants," and "tetrahydrocannabinol concentration"; to exclude cannabidiol and cannabidiol-rich plants from the definition of marijuana; and to remove cannabidiol and cannabidiol-rich plants from coverage under the CSA. It also specifies that no provision of this bill prohibits or restricts the use, production, or distribution of marijuana in a state in which such activities are legal under state law.