Hmm, that's interesting. I've found conflicting things online (esp. for our state of WA) but here is what one "clinic" writes:
Our physicians can authorize access to medical marijana for the safe homeopathic treatment of your medical condtion.
Fourteen states have enacted laws and many of those residents have found relief from pain and other symptoms with medical marijuana. GreenLeaf Care specializes in providing medical marijuana prescriptions & recommendations, treatment plans, patient verifications and ID cards. Our physicians are compassionate and knowledgeable, and are experts in the field of medical marijuana.
On the other hand, I was just reading that your physician must "recommend" it so I don't know if that entails an Rx or not.