Before you book: New Mexico patient enrollment is for New Mexico residents, so have New Mexico identification ready. If you qualify, a New Mexico-licensed practitioner will start your application in the Department of Health's Online Patient Portal, and you'll finish it there at no state cost. Visitors who already hold a valid medical card from another state should look into registering as a reciprocal participant instead. Patients under 18 need a parent or legal guardian as caregiver.