Rivlas, I don't know their doctor at all and seeing that I'm "ONLY" their grandson's wife, they wouldn't let me go to the doctor with them. Their own daughter had a hard enough time getting them to let her come with them when she was here for a visit.
You are very right, though, what they say about their health is usually far from the truth. When Pop had a stroke last Christmas, he didn't tell anybody, didn't want to go to hospital because he was afraid they would take his licence. My FIL (their SIL) went over to visit them and noticed Pop was slurring his words and his face was drooping on one side. Turned out he had the stroke about 24 hours before that, but wanted to keep it a secret. Lucky my FIL just called him an ambulance although Pop was lamenting that it wasn't necessary. He ended up spending 2 weeks in hospital. He's much better now, fortunately. But it just shows the lngths he'll go to to remain independent.

Saša