7 things to know about Montana's medical marijuana program

Montana's medical marijuana registry is run by the Cannabis Control Division of the Department of Revenue. A Montana resident with a listed debilitating condition gets a Physician's Statement from a Montana-licensed MD or DO, in person or by telemedicine. The resident then applies online through the TransAction Portal within 60 days. The fee is $20, a temporary card can be printed right after submitting, and cards last up to one year. Cardholders pay a 4% state tax instead of the adult-use rate, can buy up to 5 ounces of flower a month, and may grow four mature plants at home. Adult-use cannabis is also legal.

7 things to know

1. The registry fee is $20 for a new card or renewal, and a replacement card costs $10.
2. Cards are valid for up to one year.
3. Apply within 60 days of the date on your Physician's Statement.
4. Only MDs and DOs licensed in Montana can sign the Physician's Statement.
5. Cardholders can buy up to 1 ounce of flower a day and 5 ounces a month.
6. Medical purchases carry a 4% state tax.
7. Cardholders may grow 4 mature plants and 4 seedlings, twice the adult-use limit.

At a glance

• State fee: $20
• Card lasts: Up to 1 year (shorter if the physician says so)
• Processing: Temporary card can be printed right after submitting online
• Patient limit: 1 oz of usable marijuana
• Home grow: 4 mature plants and 4 seedlings per cardholder (adults 21+ under adult-use: 2 mature and 2 seedlings); must own the property or have the owner's written permission
• Recreational sales: Legal for adults 21+
• First visit online: Yes

Sources

• Montana DOR - Cardholder Information
• Montana DOR - Physician Statement for a Debilitating Medical Condition
• MCA 16-12-102 - Definitions
• MCA 16-12-515 - Legal protections, allowable amounts
• MCA 16-12-509 - Written certification, accompanying statements
• MCA 16-12-502 - Definitions (standard of care)

This guide is general information, not medical or legal advice. Laws change — confirm details with your state agency. State facts last checked October 7, 2026.