Hello, The first step is to get in touch with a practitioner registered with the NY Department of Health in order to issue you a state certificate. HelloMD can help you get in touch with NY practitioners! After you are certfied, You register with the state and receive you mmj card within 2 weeks. With your state certificate and your state issued medical marijuana ID card, you may visit a dispensary to purchase you medication. Chronic pain is qualifying condition for MMJ in NY.