Medical marijuana contacts

The Medical Marijuana Registry does not have a customer service window. We can’t make copies, provide you with envelopes, or provide notary services. Please contact us via phone or email at:

Please mail your forms or requests to:

Colorado Department of Public Health and Environment


4300 Cherry Creek Drive South

Denver, CO 80246 

You can place applications and other forms in our drop box, inside the first set of glass doors at the southeast entrance of Building C on our campus.
  • The box is available 7 a.m.-6 p.m. Monday-Friday.
  • No receipt will be issued.
  • All items for the drop box must be in a sealed envelope.
  • Please use U.S. Postal Service Certified/Registered Mail if you want a receipt for proof of mailing. 

Medical Marijuana Registry blog    

Updates on program changes, opportunities for stakeholder feedback, and notices of upcoming meetings

Sign up for electronic updates

General updates on all policies, procedures, regulations, legislation and other activities of the registry