Medical marijuana is available through state-licensed dispensaries in the 38 states (plus Washington, D.C.) that have active medical cannabis programs. You can’t walk into a dispensary and buy it off the shelf, though. Every state requires you to first get certified by a licensed healthcare provider, then register with your state’s program before you can make a purchase. The process typically takes anywhere from a few days to a few weeks depending on where you live.
How the Application Process Works
While the details vary by state, the path to getting medical marijuana follows roughly the same three steps everywhere.
First, you need a certification from a licensed healthcare provider. This means seeing a physician, physician assistant, or nurse practitioner who confirms you have a qualifying medical condition. In some states, your regular doctor can do this. In others, you may need to see a provider who specifically participates in the state cannabis program. During this visit, provide your email address and ask for an appointment summary and a list of your current medications, as you’ll likely need both when you visit a dispensary.
Second, you register with your state’s medical cannabis program. After your provider certifies your condition, most states send you an email with a link to complete your enrollment application online. State staff review the application, which can take up to 30 days in some places, so plan ahead. If your state issues a physical ID card, it will be mailed to you once approved. Some states, like New York, give you access to a temporary digital card while you wait.
Third, once approved, you can purchase medical cannabis at a licensed dispensary. Before your first visit, many states ask you to complete a patient self-evaluation online and schedule an appointment with the dispensary.
Qualifying Medical Conditions
Every state maintains its own list of conditions that qualify for medical marijuana, and these lists range from narrow to broad. Nearly all states include epilepsy, cancer, multiple sclerosis, and chronic pain. Many also cover PTSD, Crohn’s disease, and HIV/AIDS.
Some states keep their lists tight. Texas, for example, limits its program to epilepsy, seizure disorders, multiple sclerosis, spasticity, ALS, autism, terminal cancer, and incurable neurodegenerative diseases. Other states allow any condition a physician deems appropriate. Your state health department’s website will have the definitive list for where you live.
Telehealth Certifications
Many states now allow you to get your medical marijuana certification through a video visit rather than an in-person appointment. This has made the process significantly more accessible, especially for patients with mobility issues or those in rural areas.
The rules for telehealth certifications mirror in-person visits in most ways. Providers must hold a valid license in the state where you’re located, not just where they’re physically sitting. They’re held to the same standard of care and must obtain your informed consent before the visit, which can be verbal or written depending on the state. A handful of states still require at least one in-person visit before a telehealth renewal, so check your state’s specific rules. Several third-party platforms now connect patients with certifying physicians by video, often completing the process in a single appointment.
Finding a Licensed Dispensary
Every state with a medical program maintains an official registry of licensed dispensaries. The safest way to find a legitimate location is through your state’s health department or cannabis commission website, which will have a dispensary locator or a license verification tool. Georgia’s cannabis commission, for instance, lets you verify any dispensing license directly on its site. Avoid relying solely on third-party directories, which may include outdated or inaccurate listings.
Some states have dozens of dispensaries spread across metropolitan and rural areas, while others have only a handful. Your state registry account will typically show you the nearest locations once you’re approved.
How Much You Can Buy and Possess
States set limits on both how much you can purchase in a given period and how much you can have on hand at any time. These limits are usually defined as a 30-day or 60-day supply.
Missouri offers a useful example of how this works. Patients there can purchase up to 6 ounces of dried flower (or its equivalent in other forms) within a 30-day period. They can possess up to a 60-day supply, which amounts to 12 ounces, at any given time. Patients who grow their own can possess up to a 90-day supply, as long as anything beyond the 60-day limit stays in a locked, state-approved facility. A physician can certify a patient for higher amounts if medically necessary.
Your state’s limits may be higher or lower. Some states measure limits in weight, others in THC content. Your dispensary will track your purchases to ensure you stay within legal bounds.
Caregivers Can Purchase on Your Behalf
If you’re unable to visit a dispensary yourself, most states allow you to designate a caregiver who can pick up medical marijuana for you. In Pennsylvania, a caregiver must be at least 21 years old, register with the state program, pass a criminal background check, and pay for their own ID card. Once approved, caregivers in Pennsylvania can serve an unlimited number of patients.
In states like Missouri, caregivers can possess a separate legal supply for each patient under their care (up to six patients) and an additional supply for themselves if they’re also a qualifying patient. The specific rules for caregiver registration, age requirements, and patient limits differ by state.
Traveling With a Medical Card
Your medical marijuana card does not automatically work in other states. Some states offer reciprocity, meaning they recognize out-of-state cards to varying degrees, but the patchwork of rules is complicated.
A few states offer full dispensary access to visiting patients with a valid out-of-state card: Maine, Michigan, Nevada, New Mexico, Puerto Rico, and Washington, D.C. Others require you to apply for a temporary visitor card before you can buy anything. Arkansas issues visitor cards valid for up to 90 days, while Hawaii and Utah offer 21-day visitor cards, with a maximum of two per year.
Some states let you possess cannabis with an out-of-state card but won’t let you purchase it there. Iowa allows visiting patients to possess up to 4.5 grams of THC, and Georgia allows possession of up to 20 ounces of low-THC oil, but neither state lets visitors buy from local dispensaries. New Hampshire permits possession of up to 2 grams but no purchases.
Illinois, notably, does not accept out-of-state medical cards at all. Always check the specific rules for any state you plan to visit, because getting this wrong can have legal consequences.
Keeping Your Card Current
Medical marijuana cards expire, and the renewal process matters. In New York, if your practitioner extends your certification before it expires, you keep your same card and registration without interruption. If you let it lapse, you’ll need to obtain a new certification, re-register online, and wait for a new card to be mailed. New York does provide a temporary digital ID valid for 30 days while you wait for the physical card.
Most states follow a similar pattern: renewing before expiration is simple, while renewing after expiration means starting nearly from scratch. Set a reminder at least a month before your card’s expiration date to avoid gaps in access.
Federal Law Still Applies
Marijuana remains a Schedule I controlled substance under federal law, which means it’s technically illegal to manufacture, distribute, or possess regardless of your state card. Rescheduling efforts have been underway since 2022, when President Biden asked federal agencies to review marijuana’s classification. In August 2023, the Department of Health and Human Services recommended moving it to Schedule III. In May 2024, the Attorney General issued a proposed rule to do so, and in December 2025, President Trump issued an executive order instructing the attorney general to expedite the process.
Even if rescheduling is finalized, marijuana would still be a federally controlled substance. It would simply face less restrictive regulation. For now, the practical reality is that federal enforcement against individual state-legal medical patients has been extremely rare, but the legal conflict means you cannot fly with medical marijuana, use it on federal property, or carry it across state lines, even between two states where it’s legal.