Frequently asked questions What about MMJ recommendations for Washington Caregivers? Patients aged under 18 need a caregiver and “Designated Provider”. Designated provider is a person who has been designated in writing by a patient to serve as a designated provider. The caregiver must be 21 years of age or older. The provider must also possess either authorization from the qualifying patient’s health care professional or has been entered into an authorized database. The provider must only provide cannabis to the expressed patient. Minors under the age of 18 who are in need of medical cannabis need to renew their medical marijuana recognition card and speak to a physician every 6 months.