Short answer: a California medical marijuana card, the county-issued Medical Marijuana Identification Card (MMIC), is voluntary. The state says a county can charge up to $100 per application or renewal, and the card may be valid up to one year. Three differences show up in the state’s own pages: a sales and use tax exemption that needs the card, higher possession and daily purchase limits for medicinal patients, and medicinal access from age 18 with a physician’s recommendation. Whether those matter to you depends on how much you buy, your age, and whether you want to grow at home.
If you want the application steps, our California medical marijuana card guide covers them in full.
What the card costs and how long it lasts
The CDPH MMIC frequently asked questions say county programs may charge up to $100 per card application or renewal. Medi-Cal beneficiaries get a 50 percent reduction in the application fee, not to exceed $50, and fees are waived for indigent patients who are eligible for and take part in the County Medical Services Program. Fees are set county by county, so contact your county program for its figure. The MMIC may be valid up to one year, and a primary caregiver card expires when the patient’s card expires.
Is it easy to get the card?
It is a county process: you need a copy of your physician’s recommendation, proof of identity and proof of residency, and you make an appointment with the health department in your county of residence to pay the fee and have your photo taken. The county has 30 days to verify your application, and the FAQ says it can take up to 35 days to receive the card if the application is complete and no reason to deny it comes up. The full steps are in our California medical marijuana card guide.
Adult-use buyer, medicinal patient or card holder: side by side
The table compares three positions: an adult-use buyer aged 21 or older, a medicinal patient with a physician’s recommendation only, and a patient who also holds the county-issued MMIC.
| Point | Adult-use buyer, 21 or older | Medicinal patient, recommendation only | Patient with the MMIC card |
|---|---|---|---|
| Minimum age | 21 (DCC what’s-legal page; DCC regulations §15404) | 18 with a valid physician’s recommendation (DCC regulations §15404) | 18 with a recommendation for retail sales (DCC regulations §15404). CDPH says a minor can apply for an MMIC under certain conditions. |
| Sales and use tax | Generally applies: statewide rate 7.25 percent, plus any district tax (CDTFA tax facts page) | Exemption requires a valid MMIC and government ID, so it does not apply here (CDTFA cannabis retailers page) | Exempt when the patient furnishes a valid MMIC and government ID at purchase (CDTFA cannabis retailers page) |
| Cannabis excise tax | 15-percent cannabis excise tax, collected from purchasers (CDTFA tax facts page) | Still applies; the exemption does not cover it (CDTFA cannabis retailers page) | Still applies; the exemption does not cover it (CDTFA cannabis retailers page) |
| Daily purchase limit | 28.5 grams non-concentrated cannabis, 8 grams concentrate, or 6 immature plants (DCC regulations §15409) | 8 ounces of dried mature flowers or the plant conversion, or 12 immature plants; a physician’s recommendation may set a different amount (DCC regulations §15409) | Same as recommendation only (DCC regulations §15409 covers medicinal patients, including card holders) |
| Possession limit | Up to 8 ounces of dried marijuana per qualified patient, and no more than 6 mature or 12 immature plants (CDPH FAQ, citing Health and Safety Code 11362.77) | Same as recommendation only (CDPH FAQ, citing Health and Safety Code 11362.77) | |
| Potency and product access | Edibles: up to 10 mg THC per serving and 100 mg per package. Topical or concentrate: up to 1,000 mg THC per package (DCC regulations §17304) | Higher limits only for products labeled “FOR MEDICAL USE ONLY” and sold only to medicinal-use patients: orally dissolving up to 500 mg THC per package; topical or concentrate up to 2,000 mg per package (DCC regulations §17304) | Same as recommendation only |
| Home growing | Up to 6 plants at 21 or older (DCC what’s-legal page); no volatile solvents to make products at home | Can grow more plants if their physician recommends it (DCC what’s-legal page); CDPH cites a 6 mature or 12 immature plant possession limit | Same as recommendation only (CDPH FAQ) |
| Parental and custody protection | Not listed for adult-use buyers | Under Proposition 64, a qualified patient’s status and conduct “shall not, by itself, be used to restrict or abridge custodial or parental rights” (CDPH FAQ) | Same as recommendation only (CDPH FAQ) |
| Privacy and verification | Not listed for adult-use buyers | Not listed | Patient information is deemed medical information under the Confidentiality of Medical Information Act (CDPH FAQ, citing Health and Safety Code 11362.713). The MMICP registry lets law enforcement and the public verify validity (CDPH MMICP page). |
Sales tax: the difference that needs the card
The CDTFA’s cannabis retailers page says medicinal cannabis sold to qualified patients and primary caregivers is exempt from sales and use tax when they furnish both a Medical Marijuana Identification Card and a government-issued identification card. The same page says the exemption only applies to sales and use tax and does not apply to the cannabis excise tax. For adult-use buyers, the CDTFA cannabis tax facts say the retailer collects a 15-percent cannabis excise tax from purchasers, and the statewide sales and use tax rate is 7.25 percent, higher where district taxes also apply.
Whether the card lowers your bill depends on what you buy and where you buy it. Use those rates to work out your own total.
Purchase and possession limits
Under the DCC regulations (§15409), a single adult-use customer may not buy more than 28.5 grams of non-concentrated cannabis, 8 grams of concentrate, or 6 immature plants in one day. A medicinal patient may not buy more than 8 ounces of dried mature flowers or the plant conversion, or 12 immature plants, in one day. If a valid physician’s recommendation lists a different amount, the patient may buy an amount consistent with that recommendation. The limits cannot be combined to go above any one of them.
The CDPH FAQ, citing Health and Safety Code 11362.77, says a qualified patient or primary caregiver may possess no more than eight ounces of dried marijuana per qualified patient, plus no more than six mature or twelve immature plants. The Department of Cannabis Control’s what’s-legal page says medicinal users have higher possession limits.
Minimum age, and buying with a recommendation at 18 to 20
If you are 18, 19 or 20, the recommendation is what the state’s rules use for medicinal sales: a licensed retailer may sell medicinal cannabis to a person who is at least 18 and has a valid physician’s recommendation, after checking age, identity and the recommendation (DCC regulations §15404). Adult-use sales are limited to customers 21 and older (DCC regulations §15404). Under 18, the CDPH FAQ says a minor can apply for an MMIC under certain conditions, and if the minor is not emancipated or self-sufficient, the county must contact a parent, legal guardian or person with legal authority to make medical decisions.
Potency and product access
Under DCC regulations §17304, an edible may not contain more than 10 milligrams of THC per serving or 100 milligrams per package, and a topical or cannabis concentrate may not contain more than 1,000 milligrams per package. Higher amounts are allowed only for medicinal-use products. Orally dissolving products, such as sublingual lozenges or mouth strips, may contain up to 500 milligrams per package if they are in discrete servings of no more than 10 milligrams per piece, labeled “FOR MEDICAL USE ONLY,” and sold only to a medicinal-use patient. A topical product or concentrate may contain up to 2,000 milligrams per package if it is labeled “FOR MEDICAL USE ONLY” and sold only to a medicinal-use patient.
Home growing
The what’s-legal page says you can grow up to 6 cannabis plants at home if you are at least 21, and that medicinal users can grow more if their physician recommends it. Some cities and counties have their own home grow rules, such as permit requirements or indoor-only grows. If you turn cannabis into a product, the page says you cannot use volatile solvents like butane or propane. If home growing is your reason to get the card, the what’s-legal page says medicinal users can grow more plants if their physician recommends it.
Parents, privacy and what the card identifies
The CDPH FAQ says the MMIC identifies the cardholder as a person protected under Proposition 215 and Senate Bill 94, and that it helps law enforcement see that the cardholder can legally possess certain amounts of medical marijuana. Proposition 64 extended privacy protection to MMIC holders, so patient information is treated as medical information under California’s Confidentiality of Medical Information Act (Health and Safety Code 11362.713). For parents, the FAQ quotes the law: a qualified patient’s status and conduct “shall not, by itself, be used to restrict or abridge custodial or parental rights to minor children” in family or juvenile court.
What the card does not change
These rules appear on the Department of Cannabis Control’s what’s-legal page for cannabis users generally. Cannabis is still illegal under federal law, so you cannot use or possess it on federal lands, like national parks, or take it across state lines. You can use cannabis on private property, but not in public places like restaurants or bars. You cannot smoke it where tobacco smoking is illegal, or within 1,000 feet of a school, day care center or youth center while kids are present. Property owners can ban use on their property, and most hotels do not allow it in the room. Cities and counties may have stricter laws than the state, so check your city or county website for the beach or park you plan to visit.
On the road, the same page says having an open container of cannabis while driving or riding in a vehicle is illegal. Cannabis in a vehicle must be in a sealed package or container, or in the trunk. That open-container rule is the one that answers the passenger-seat question. Officers can pull you over for a sobriety test if they suspect you are driving under the influence.
Work rules are a separate question. Before you assume the card covers you at work, read our california marijuana drug test employment law page.
Can you walk into a dispensary?
Yes, if you meet the age rule and show ID. The DCC retail page says retailers must check your ID, and acceptable forms include a government-issued photo ID such as a driver’s license, a military photo ID card, or a passport. Retailers can sell between 6:00 a.m. and 10:00 p.m., and a city or county can set stricter hours. The what’s-legal page says you can also order online for in-store pickup or delivery. Only licensed retailers may sell: the page warns that some stores that look legitimate are not licensed, and you can use the DCC license search and scan the QR code on a retailer’s license certificate to check its status.
Can tourists use dispensaries in California?
An adult 21 or older can buy adult-use cannabis from a licensed retailer, and the DCC regulations accept a valid passport issued by the United States or by a foreign government as ID (§15404). Medicinal sales require a valid physician’s recommendation (§15404). For a California MMIC used outside the state, the CDPH FAQ says: “It may be, but contact the state first. California does not recognize other state’s MMIC.”
What changed in 2026?
The CDTFA’s cannabis retailers page says that under AG Order No. 6754-2026, medical marijuana and medical marijuana products regulated by a state medicinal cannabis licensee have moved from Schedule I to Schedule III of the federal Controlled Substances Act. The same page ties this to licensees’ registration and tax reporting, and says these updates may increase those requirements for a licensee that gets a new license. For buyers, the age, tax and limit rules above come from the DCC and CDTFA pages linked here, and the what’s-legal page still says cannabis is illegal under federal law.
What are the downsides?
- The county sets the fee, up to $100 per application or renewal (CDPH FAQ).
- The card needs renewing, and it may be valid up to one year.
- You need a serious medical condition, and the diagnosis and recommendation must be documented in your medical records (CDPH FAQ).
- The registry lets law enforcement and the public verify whether the card is valid (CDPH MMICP page).
- The card does not change federal law, the public-use rules or the driving rules listed above.
A qualifying condition is legal access, not proof that cannabis helps. The MedlinePlus medical marijuana page says the FDA has not approved marijuana for treating any health conditions.
Costs the state does not set
The clinician visit is a separate cost the state does not set. The CDPH MMICP page says the program does not maintain lists of physicians and is not a referral service, and the FAQ says an MMIC can be obtained only at your county program, not through your attending physician or an evaluation center. Be wary of sites that charge for a “card” the state issues itself or does not issue.
HealthDataConsortium.org is a publisher, not a clinic and not a government office. For how state card programs differ, see our Medical Cannabis Card Guide.
Before you apply
- Ask your county program for its current MMIC fee and renewal requirements.
- Confirm that your diagnosis and recommendation are documented in your medical records, as the CDPH FAQ describes.
- Gather a government photo ID, proof of residency and a copy of your recommendation.
- Check your city or county rules on home grows and public use before you plan either.
- Ask the dispensary what it records before your first visit.
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.
