At present, there are over 14 states of the US where it is legal to take marijuana treatment. The state of California is one among those so one can take treatment at a cannabis dispensary in Los Angeles. However, for taking treatment at an MMJ clinic or dispensary you must hold a valid MMJ card. Now your question would be how do you obtain this card? For obtaining an MMJ card, you must get your physician's written permission, which is not an easy job. A physician will give his/her consent to an individual only when he/she feels the individual's condition is quite serious.
Once you have the written permission, you will be issued an MMJ card. You can buy cannabis from an ethical marijuana retailer by showing this card. However, for taking cannabis treatment you have to undergo several medical tests and the reports of the same will decide whether you really need this treatment or not. You will be allowed to take this treatment only if the reports indicate the same.