Frequently asked questions Is a Caregiver Needed for Medical MMJ in New Mexico? For minor patients under the age of 18, or those who are over 18 but need a caregiver due to their condition. Primary caregiver is designated by a patient’s practitioner as necessary to take responsibility for managing the well-being of a qualified patient with respect to the medical use of cannabis. Primary caregiver must be a resident of New Mexico. The caregiver must be 18 years of age or older.