However, having a valid medical marijuana card does not automatically authorize someone to purchase or possess marijuana in another state. Each jurisdiction establishes its own requirements, and the differences can be significant.
Some states allow visiting patients to purchase marijuana directly from licensed dispensaries using their existing medical cards. Others require temporary registration, additional documentation or approval from a local medical practitioner. A smaller number recognize out-of-state patients for limited possession protections but do not allow them to make medical dispensary purchases.
