To qualify for a medical marijuana card, you need three things: a medical condition your state recognizes as qualifying, proof that you’re a resident of that state and old enough to apply, and a certification from a licensed physician entered into the state’s registry. Once those pieces are in place, you submit an application to your state’s health department or cannabis agency and pay the registration fee. Forty states, three U.S. territories, and the District of Columbia run medical cannabis programs, and each sets its own rules on diagnoses, documentation, and who can certify you.1National Conference of State Legislatures. State Medical Cannabis Laws
Qualifying Medical Conditions
Every state program publishes a list of conditions that make a patient eligible. Chronic pain appears on virtually all of them and accounts for roughly two-thirds of all medical cannabis certifications, making it by far the most common reason people apply. Multiple sclerosis, chemotherapy-related nausea, PTSD, and cancer round out the top five.
Beyond those, most states also recognize epilepsy and seizure disorders, glaucoma, Crohn’s disease, Parkinson’s disease, HIV/AIDS-related wasting, and conditions that cause severe or persistent muscle spasms. Some programs include catch-all language that lets physicians certify patients whose condition is “of the same kind or class” as those explicitly listed, giving doctors room to recommend cannabis for conditions not on the official list as long as they document their reasoning.
If your condition isn’t listed, many states let you petition the health department to add it. The petition process usually requires submitting medical evidence that cannabis is an effective treatment, and a medical advisory board reviews the submission. The process can take months, and approval is far from guaranteed. It does happen, though. PTSD started on very few state lists and is now recognized in most programs.
Residency, Age, and Caregivers
A qualifying diagnosis alone isn’t enough. You also have to clear residency and age requirements before a state will issue your card.
You must be a resident of the state where you’re applying. States verify this through a combination of government-issued photo ID and a proof-of-residency document like a recent utility bill, lease agreement, or bank statement. A state driver’s license is the simplest option, but most programs also accept a U.S. passport or military ID paired with a separate residency document.
The minimum age in most programs is 18. A handful of states set it at 21 for certain product types, so check your state’s rules if you’re between 18 and 20.
Minors
Patients under 18 can qualify in most states, but the requirements are stricter. A parent or legal guardian must register as the minor’s designated caregiver and is typically the only person authorized to purchase, possess, and administer the cannabis. Some states require certification from two physicians rather than one when the patient is a minor, and at least one may need to be a pediatric specialist. The caregiver, not the minor, holds the card and handles all dispensary transactions.
Adult Caregivers
Caregivers aren’t limited to parents of minors. Adults with debilitating conditions who can’t visit a dispensary themselves can designate a caregiver, usually someone at least 21 who has been responsible for the patient’s care. Caregivers register through the same state system and receive their own card, which authorizes them to purchase and transport cannabis on the patient’s behalf within that state’s possession limits.
Getting a Physician’s Certification
No state lets you self-certify. A licensed physician, and in many states certain nurse practitioners or physician assistants, must evaluate you and formally certify that you have a qualifying condition and that cannabis is an appropriate treatment. This is where most of the qualification process actually happens. The physician has wide discretion, and having a condition on the state’s list doesn’t guarantee they’ll sign off.
During the evaluation, the physician reviews your medical history, existing diagnoses, current medications, and any prior treatments you’ve tried. Most states require that you have a documented, pre-existing relationship with the certifying physician, or at least that the physician conducts a thorough enough examination to establish one. Walk-in cannabis clinics exist in many states and are legal, but some states restrict physicians who work at dispensaries from also issuing certifications.
The certification is a formal document that goes into the state’s electronic system, not a note scribbled on a prescription pad. In most states, the physician enters the certification directly into a state registry, which then triggers your ability to apply for a card. The certification typically lasts one year, though some states allow longer periods.
Applying and Paying
Once your physician enters the certification, you apply through your state’s health department or cannabis regulatory agency. Most states now handle this through an online portal where you upload your ID, proof of residency, and a passport-style photo. A few states still require paper applications sent by mail.
Expect two separate costs. The physician evaluation typically runs $100 to $250, depending on your state and whether you use a telehealth service or an in-person clinic. The state registration fee ranges from nothing in a few states to over $150, with most falling in the $50 to $100 range. Some states offer reduced fees for veterans, Medicaid recipients, or patients on SNAP benefits, and the discount can be substantial, sometimes cutting the state fee in half.
Processing times vary widely. Some states issue a digital card within days of a complete application. Others take several weeks. A few grant a temporary authorization that lets you purchase from dispensaries while your permanent card is processed.
What Qualifying Doesn’t Protect You From
A state card is a state-level protection only. Marijuana remains classified as a Schedule I controlled substance under the Controlled Substances Act, the same category as heroin and LSD.2Office of the Law Revision Counsel. 21 USC 812 – Schedules of Controlled Substances A proposed rule to reschedule cannabis to Schedule III was published in 2024, but no final rule has been issued. Qualifying for a card does not shield you from federal law, and the gap matters in a few specific places:
- Neither the physician visit nor the dispensary purchases are covered by insurance. Medicare, Medicaid, and private health plans do not pay for medical marijuana because coverage of a Schedule I substance would conflict with federal law. Some Medicare Part D plans cover FDA-approved cannabinoid medications like Epidiolex or Marinol, but those are distinct pharmaceutical products, not dispensary cannabis.
- A card does not automatically protect your job. The Americans with Disabilities Act does not require employers to accommodate marijuana use, and courts have upheld firings and refusals to hire based on positive cannabis tests even where state law permits use. Roughly half the states with medical cannabis programs have some anti-discrimination language for cardholders, but coverage is uneven and nearly all states carve out exceptions for safety-sensitive positions. If your job involves federal contracts, DOT-regulated transportation, or safety-sensitive duties, assume a positive test can cost you the position regardless of card status.3National Conference of State Legislatures. Cannabis and Employment – Medical and Recreational Policies in the States
- Federal employees, military personnel, and anyone holding a security clearance cannot use cannabis regardless of state law. Use can also affect eligibility for federally subsidized housing.
- Federal law prohibits anyone who is “an unlawful user of or addicted to any controlled substance” from purchasing or possessing firearms. The ATF’s position is that medical marijuana cardholders fall into this category, and the question appears directly on Form 4473.
- Carrying cannabis across state lines is a federal offense even when both states have legal programs. A card qualifies you to purchase within your state, not to travel with the product.
Keeping the Card Valid
Qualifying once isn’t permanent. Medical marijuana cards expire, most commonly after one year, though some states issue cards lasting two, three, or even five years. At renewal you need a fresh physician certification, which means another evaluation appointment and another fee. The state registration fee usually applies again as well, though a few states charge less for renewals than for initial applications.
Start the renewal process at least 60 days before your card expires. If your card lapses, you lose legal authorization to purchase or possess cannabis until the renewal goes through, and most states won’t backdate protections. If your address, name, or other personal information changes during the card’s validity period, update it through your state’s registry promptly. An outdated address can cause problems at the dispensary and may technically invalidate the card in some states.