If you hold a medical card from another state and you are visiting Massachusetts, the Commission has a plain answer on its Know the Laws page: out-of-state residents cannot purchase medical marijuana in Massachusetts. This page quotes that answer and the related lines in 935 CMR 501, says where they stop and points you to the right agency for your own state.

What the Commission says

"Out-of-state residents cannot purchase medical marijuana in Massachusetts. Only Registered Qualifying Patients who are residents of Massachusetts or their Caregivers are allowed to purchase medical marijuana."

The Commission also says you cannot cross state lines with marijuana: it is illegal to drive across state lines with any kind of medical marijuana product, or to transport it on a plane, train, boat or other mode of transportation outside Massachusetts. You cannot send it by mail, even to states and countries where marijuana or medical marijuana use is legal.

The one residency exception

Registration requires Massachusetts residency for most patients. The Commission says proof of residency is required for all patients unless they are receiving palliative or end of life care or cancer treatment in Massachusetts. 935 CMR 501.002 defines a Qualifying Patient to include a non-Massachusetts resident receiving end-of-life or palliative care or cancer treatment in Massachusetts, as determined by a certifying provider. The Commission page does not exempt that patient from certification or registration.

What the regulation text says about other states

935 CMR 501.140(2)(a) says a treatment center may dispense only to a Registered Qualifying Patient who has a current valid certification with the Commission or Other Jurisdictions that permit the medical use of marijuana, or their caregiver. Other Jurisdiction is defined in 935 CMR 501.002 as the United States, another state, or a foreign jurisdiction, or a military, territorial or Native American tribal authority. The Commission pages read for this page describe no process for a visitor to use another state's card, and its Know the Laws page says out-of-state residents cannot purchase. This page does not reconcile the two. Ask the Commission before you travel.

The protection stops at the border

Registered patients in Massachusetts sign an attestation in 935 CMR 501.015(5)(g) that they understand the protections for possession of marijuana for medical use apply only within Massachusetts. The same holds for any other state's law. This page cannot tell you what another state protects.

What visitors can do

Advanced Dispensary in Peabody is a medical dispensary for registered Massachusetts patients and caregivers. It has no opening date yet.

Advanced Dispensary is a medical dispensary being renovated at 25 Newbury Street, on Route 1 in Peabody. It will serve registered patients and caregivers. It has no opening date yet. Phone: (978) 896-6640.

Short answers

Can I buy medical marijuana in Massachusetts with another state's card?

The Commission says out-of-state residents cannot purchase medical marijuana in Massachusetts. Only registered Massachusetts residents or their caregivers can.

Can I bring my medical marijuana into Massachusetts or take mine out?

The Commission says it is illegal to cross state lines with marijuana by car, plane, train, boat or any other means.

What if I am getting cancer treatment in Massachusetts?

The Commission and 935 CMR 501.002 include a non-resident receiving palliative, end-of-life care or cancer treatment in Massachusetts, as a certifying provider determines. They still have to be certified and register.

Where do I find the rules of my own state?

Check your state's medical marijuana agency. This page covers only what the Massachusetts Commission says.

More for patients

Sources

Read on October 31, 2026. The state can change its rules, so confirm on its pages before you act.

This page explains how a state program works. It is not medical or legal advice, and it makes no claim about what marijuana does for any health condition. Ask a health professional about your health.

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