How long does it take to get an Illinois Medical Cannabis Card? It can take up to 30 days to get a physical copy of your Illinois medical cannabis card, although it will usually be quicker than this. Those who fill out and send their application form online may get a temporary Illinois medical marijuana card within 24-hours. Illinois is phasing out paper medical marijuana card applications, and online registration is mandatory for renewals. We recommend applying for an Illinois medical cannabis card online after your in-person visit with a Leafwell physician if possible. Those who apply with a paper application will not get a temporary medical cannabis card.