Lois ~
I'm sorry you've had to deal with this supercilious doctor, but it happens. My neurosurgeon performed my AN debulking surgery when I was 63 (and in excellent health) and he never once mentioned my age. I concur with the previous posters that you should definitely seek out another doctor. One that actually cares about your health and isn't disdainful of patients over 60, which I would have found highly insulting. Considering this doctor's attitude, I think a mutual 'divorce' may be in order. I doubt he'll be too upset if you leave his practice.
My neurosurgeon was very diligent about ordering MRI scans for me but my last one, in 2008, showed tumor necrosis and some minor shrinkage so I've not asked for another MRI due to having no symptoms and financial considerations. My neurosurgeon, a very conservative and compassionate doctor, has not asked me to have another MRI so I assume it isn't imperative. However, should any new symptoms arise, I wouldn't hesitate to ask him to order a 'fresh' MRI - and I'm confident that we would, without question. I would venture that if you're not experiencing any new symptoms, postponing an MRI may be considered - but that is strictly a personal choice that only you can make.
On a separate note: any doctor that is enthusiastic about Obamacare must believe they'll serve their patients better by having more patients to see each day and less income, I guess. Seems odd to me. MY PCP, in his 50's, is seriously considering retirement rather than have government bureaucrats 'supervising' his medical decisions and overruling his choices for his patients based entirely on cost - and/or age. AT 67, I think Obamacare will be a disaster for me and the millions of Americans in my age bracket, but, because ObamaCare doesn't fully take effect until 2014, only time will tell. However, I'm not optimistic.
Jim