I see the Multiple Sclerosis Association of America as a rather different type of group. The MSAA provides free cooling equipment for folks with MS, free MRIs for those who can't afford to get needed scans of the brain and spinal cord, and sponsors various activity-based fundraisers (swims, for instance). The MRI fund was just re-established in 2016, after being offline for a while.
It's not that the MSAA is all about living with MS drug-free or anything like that (they have plenty of pharma-related info online and in print), it's just that they seem to do immediately helpful things for folks with MS. So it's a cool organization that I'm hoping to stay connected with.
In a future post, I should talk a bit about MS Australia, another national MS society. From what I've seen, MS Ausralia has a different character still, sponsoring a variety of public lectures (some of which are online).