Legal status of marijuana in Washington Washington DC, the United States capital, is one of the more than twenty states that have legalized medical marijuana. The bill was approved in 2010 and has helped a lot of ill people since then.If you want to be part of the medical marijuana program in Washington DC, you have to meet certain qualifications. First of all, you need to go through an exam conducted by a licensed medical marijuana doctor who will diagnose you and verify that you are ...