Short answer: the Illinois Department of Public Health (IDPH) lists the state fee for a medical cannabis patient registration at $50 for one year, $100 for two years, or $125 for three years. Three differences set the card apart from buying as an adult-use buyer: the tax on your purchase, the amount you can buy and hold over a 14-day period, and whether you can grow plants at home. Which of these matter depends on how you buy: the tax and limits matter most to frequent buyers, the home-grow rule to someone who wants to grow, and the minor-patient rules to a parent.
IDPH calls the card a registry identification card, and its Medical Cannabis Patient Program page says that since June 22, 2021 the card is no longer mailed and is printed or downloaded from your medical cannabis patient account. If you have not applied yet, start with our Illinois step-by-step guide.
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What the state charges for the card, and for how long
IDPH’s MCPP registry card fee page lists the regular patient application fee at $50.00 for a 1-year term, $100.00 for a 2-year term, and $125.00 for a 3-year term. The Illinois Administrative Code Section 946.210 sets the reduced qualifying patient fee at $25 for one year, $50 for two years, and $75 for three years. That section also says all fees are non-refundable and that the Department may revise them annually.
The Department may reduce the fee for patients enrolled in SSDI or SSI, veterans with proof of service, people receiving certain retirement-system disability benefits, patients 65 or older, people enrolled in WIC, LIHEAP, SNAP, TANF or Medicaid, and people experiencing homelessness, each with the proof that section lists. For a life-long debilitating medical condition, Section 946.210(d) says cards are renewed every three years for $50.
To apply, IDPH’s adult patient registration page asks for your patient details, a health care professional certification number, and proof of identity. The full sequence is in our Illinois step-by-step guide.
The clinician visit that produces the certification is a separate cost the state does not set, and this page gives no price for it.
Be wary of any site that charges for a “card”: IDPH issues the registry card itself, and Section 55(c) of the Compassionate Use of Medical Cannabis Program Act says “No person or business shall charge a fee for assistance in the preparation, compilation, or submission of an application.”
Medical card versus adult-use buying, side by side
| Point | Registered patient (IDPH registry card) | Adult-use buyer |
|---|---|---|
| Tax on a purchase | Section 65-10(c) of the Cannabis Regulation and Tax Act: no tax on cannabis subject to tax under the Compassionate Use of Medical Cannabis Program Act. Beginning 90 days after the effective date of the 104th General Assembly amendatory Act (P.A. 104-463), no tax on adequate-supply purchases from a Medical Cannabis Dispensing Organization licensee. | Section 65-10(a) of the Cannabis Regulation and Tax Act: 10% of the purchase price for cannabis at or below 35% adjusted delta-9 THC; 25% above 35%; 20% for cannabis-infused products. |
| Possession limit | Adequate medical supply: 2.5 ounces of usable cannabis per 14-day period (Section 10, Compassionate Use of Medical Cannabis Program Act, 410 ILCS 130/10). A health care provider’s waiver can increase it (Medical Cannabis Limits, Explained, Cannabis Regulation Oversight Office). | Section 10-10(a) of the Cannabis Regulation and Tax Act: 60 grams of cannabis flower; no more than 1000 mg of THC in cannabis-infused product; 10 grams of cannabis concentrate, for residents 21 or older. |
| Period the limit covers | 14 days | Section 10-10 of the Cannabis Regulation and Tax Act does not show a 14-day period. |
| Home growing | Up to 5 plants taller than 5 inches per household, in an enclosed, locked space (Section 10-5(b)(1)-(2), Cannabis Regulation and Tax Act). | Not in Section 10-5(b)(1), which gives home cultivation to registered qualifying patients aged 21 or older. |
| Buying while the application is pending | Provisional registration for 90 days or until denial or receipt of the card, whichever is earlier (Section 55(b), Compassionate Use of Medical Cannabis Program Act). | Section 10-10 of the Cannabis Regulation and Tax Act does not show a pending-application rule. |
The tax on your purchase
For an adult-use buyer, Section 65-10(a) of the Cannabis Regulation and Tax Act sets the tax as a share of the purchase price: 10% for cannabis at or below 35% adjusted delta-9-tetrahydrocannabinol, 25% for cannabis above 35%, and 20% for a cannabis-infused product. Section 65-10(b) applies the tax to the full purchase price of any product that contains cannabis.
For a registered patient, Section 65-10(c) says the tax “is not imposed on cannabis that is subject to tax under the Compassionate Use of Medical Cannabis Program Act.” It adds that “Beginning 90 days after the effective date of this amendatory Act of the 104th General Assembly, the tax imposed under this Section shall not be imposed on cannabis or cannabis-infused products purchased by a qualified patient” as part of their adequate medical supply from a Medical Cannabis Dispensing Organization licensee. The section’s source note lists P.A. 104-463, effective 6-12-26.
The medicines rate is set separately. 35 ILCS 120/2-10 says that for prescription and nonprescription medicines and drugs “the tax is imposed at the rate of 1%.” It also says that, beginning 90 days after the effective date of the same amendatory Act, that category includes cannabis or cannabis-infused products purchased by a qualified patient “as part of that individual’s adequate medical supply” from a dispensary licensed as a Medical Cannabis Dispensing Organization.
If you buy often, this is the difference you will see first. Compare the tax line on a dispensary receipt with the rates above to see which one was applied.
How much you can buy and possess
A registered patient’s supply is measured as an adequate medical supply, defined in Section 10 of the Compassionate Use of Medical Cannabis Program Act as “2.5 ounces of usable cannabis during a period of 14 days that is derived solely from an intrastate source.” That section lets a patient apply for a waiver where a certifying health care professional states in a signed, written statement that “2.5 ounces is an insufficient adequate medical supply for a 14-day period,” subject to IDPH rules.
The state’s Medical Cannabis Limits, Explained sheet says there is one limit that “includes all flower, pre-rolls, vapes, edibles, oils, and all cannabis products.” It gives the typical 2.5-ounce limit as 70.87 grams of flower, or 21,300 mg of THC in edibles or beverages, or 21.3 grams of THC in vapes or concentrates.
For an adult-use buyer, Section 10-10(a) of the Cannabis Regulation and Tax Act sets the possession limit for a resident 21 or older at 60 grams of cannabis flower, no more than 1000 mg of THC in cannabis-infused product, and 10 grams of cannabis concentrate. Section 10-10 does not show a 14-day period.
The two limits work differently in practice. A frequent buyer on the adult-use side is measured against the possession limit, while a patient is measured against the 14-day supply. Section 10-10(d-1) also says a patient shall not “knowingly obtain, seek to obtain, or possess” more than their adequate medical supply, so the card does not raise that ceiling. A heavy buyer who needs more than the typical 2.5 ounces in 14 days is the reader for whom the waiver process matters.
Growing cannabis at home
Section 10-5(b)(1) of the Cannabis Regulation and Tax Act allows “An Illinois resident 21 years of age or older who is a registered qualifying patient” under the Compassionate Use Act to cultivate cannabis, “with a limit of 5 plants that are more than 5 inches tall, per household without a cultivation center or craft grower license.” A dwelling “shall not contain more than 5 plants at any one time” under Section 10-5(b)(7). The section says the grower must be domiciled in Illinois for 30 days before cultivation, that cultivation takes place in an “enclosed, locked space,” and that plants are not stored where they are subject to ordinary public view.
Section 10-5(b) also requires that cultivation be on residential property lawfully in the grower’s possession, and that an owner or lessor may prohibit it. Plants may only be tended by registered qualifying patients who live at the residence, or by an authorized agent for brief periods. Adult registered patients may buy seeds from a dispensary for home cultivation, but seeds may not be given or sold to anyone else. Under Section 10-5(b)(9), a patient who grows more than the allowed number of plants or sells or gives plants away is liable for penalties and loses home cultivation privileges.
If you want to grow, this is the difference that matters most. The permission in Section 10-5(b)(1) is written for registered qualifying patients aged 21 or older.
Buying while your application is pending
Under Section 55(b) of the Compassionate Use of Medical Cannabis Program Act, a person with a written certification who has submitted a completed online application “shall receive a provisional registration and be entitled to purchase medical cannabis from a licensed dispensing organization for a period of 90 days or until his or her application has been denied or he or she receives a registry identification card, whichever is earlier.” To buy, you must present the provisional registration with a valid driver’s license or state identification card, and the dispensary verifies it through IDPH’s online verification system.
The same section says the dispensary “shall dispense no more than 2.5 ounces of medical cannabis during a 14-day period” under a provisional registration. A new provisional registration may be obtained after 90 days if IDPH has not issued a card or denied the application within those 90 days. This matters most to someone who has applied and is waiting for approval.
Minors, caregivers and parents
Under Section 10 of the Compassionate Use Act, a designated caregiver must be “at least 21 years of age” and assist no more than one registered qualifying patient, except that “the parent or guardian of a registered qualifying patient may assist each of their children who are registered qualifying patients.” IDPH also lists a separate Minor Qualifying Patient Application.
The state’s limits sheet says “Minor qualifying patients are limited to only cannabis-infused products.” For a parent, Section 10-15 of the Cannabis Regulation and Tax Act also matters. Section 10-15(a) says the Act does not allow a person under 21 to purchase, possess, use, process, transport, grow, or consume cannabis except where authorized by this Act, the Compassionate Use of Medical Cannabis Program Act, or the Community College Cannabis Vocational Program. Section 10-15(d) makes it unlawful for a parent or guardian to knowingly permit an under-21 invitee of their child to use cannabis in a way that violates the section, on property or in a vehicle under the parent’s control, and it is a Class A misdemeanor with a fine of not less than $500.
What the card does not change
The card does not let you hold more than your adequate medical supply. Under Section 10-10(d), no person may knowingly obtain or possess an amount that would exceed the possession limit, including cannabis obtained as a qualified registered medical patient. Section 10-10(d-1) applies the same rule to your adequate medical supply.
Out-of-state cards are a separate question. The IDPH reciprocity page states that “Illinois does not accept out-of-state medical cards,” and it lists the states that accept Illinois cards and the access each allows. Check the rules of the state you plan to visit.
Whether a card changes anything at work is a separate question, and our illinois marijuana drug test law page covers it.
Privacy
IDPH’s Medical Cannabis Patient Program page says the program “protects patient confidentiality while striving to ensure timely accessibility to cannabis for registered patients.”
A qualifying condition is legal access, not proof
To qualify, you need a diagnosis of a debilitating medical condition from a certifying health care professional, which is what makes you a “qualifying patient” under Section 10 of the Compassionate Use Act. That is legal access, not proof that cannabis helps. A 2014 review, Medical marijuana in neurology, indexed on PubMed, says “A small number of high-quality clinical trials support the safety and efficacy of cannabinoids” for certain conditions, and that “Data are also limited in regards to adverse events and safety.”
Before you apply
- Check the fee on IDPH’s fee page before you pay, since the Department may revise fees annually under Section 946.210(a).
- Call IDPH’s Medical Cannabis Patient Program at 1-855-636-3688, Monday through Friday, 9 a.m. to 4 p.m., or email DPH.medicalcannabis@illinois.gov.
- Ask your clinician what the visit costs, since the state does not set that price.
- Look at the tax line on your dispensary receipt to confirm which rate was applied.
For how state card programs differ beyond Illinois, see our Medical Cannabis Card Guide.
By HealthDataConsortium.org Research Team
This article is for general information purposes only and does not constitute medical advice. Consult your doctor or qualified healthcare provider before making changes to your health routine.
