Psilocybin law and access in Massachusetts

A concise, source-dated explanation of statewide law, regulated access, and the difference between state and local policy.

Laws and implementation can change quickly. This page is educational information, not legal advice.

Possession

Statewide legal status

Massachusetts classifies psilocybin and psilocyn as Class C controlled substances. Knowing possession remains unlawful unless authorized by law.

Regulated access

Programs and services

Massachusetts has no current statewide psilocybin service-center, personal-use, dispensary, or retail program.

Current context

2026 pilot and treatment-center proposals advancing

Massachusetts has no enacted statewide psilocybin access program, but several 2026 proposals advanced through legislative committees. H.2203 and H.4200 received favorable committee recommendations and were referred to House Ways and Means, while H.4986 remains under review as a therapeutic psilocybin treatment-center proposal.

What local policy means

Massachusetts has documented municipal actions in Cambridge, Northampton and Somerville. Those actions affect local priorities only; they do not create statewide legalization, licensed retail, or medical suitability.

2026 Massachusetts psilocybin policy update

Massachusetts lawmakers advanced multiple psilocybin-related proposals during 2026. H.2203 would create a Department of Public Health pilot for regulated psilocybin access for adults with post-traumatic stress disorder and certain other specified conditions. After favorable committee votes in March and July, the bill was referred to House Ways and Means on July 22, 2026.

H.4200 would authorize a pilot for psychedelic use in licensed treatment facilities and likewise received favorable committee recommendations before referral to House Ways and Means on July 23, 2026. H.4986, a separate proposal concerning therapeutic psilocybin treatment centers, was reported favorably by the Public Health Committee and remains under legislative review. These measures are proposals rather than current statewide access law.

Cities covered by the Massachusetts guide

The statewide explanation above covers Boston, Cambridge, Northampton, Somerville and Worcester. A separate page appears below only where a documented municipal action adds material local context.

BostonCovered in Massachusetts guide

CambridgeDocumented local policy NorthamptonDocumented local policy SomervilleDocumented local policy

WorcesterCovered in Massachusetts guide

Sources used for this review

This review prioritizes Massachusetts statutes, official 2026 legislative records, statewide ballot results, and documented local-policy sources.

Common questions

Is psilocybin legal in Massachusetts?

Massachusetts classifies psilocybin and psilocyn as Class C controlled substances. Knowing possession remains unlawful unless authorized by law. Massachusetts has no current statewide psilocybin service-center, personal-use, dispensary, or retail program.

Does Massachusetts have a regulated psilocybin access program?

Massachusetts has no current statewide psilocybin service-center, personal-use, dispensary, or retail program.

Do city policies change Massachusetts law?

No. Cambridge, Northampton, and Somerville actions affect local priorities only. They do not legalize commercial sale, establish statewide access, or override Massachusetts or federal law.

What changed in Massachusetts psilocybin policy in 2026?

Several proposals advanced through legislative committees in 2026. H.2203 and H.4200 were favorably reported and referred to House Ways and Means, while H.4986 remains an active therapeutic-center proposal. None of these measures has created a statewide psilocybin access program as of this review date.

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