How can we get our Mom (92) out of the house to see a doctor?

Soninlzaw, fib to your Mom tell her that her health insurance will be cancelled if she doesn't get a yearly checkup. Sometimes that will get an elder to go to the doctor if they think they no longer will have health insurance and will have to pay everything out of pocket.

How would you physically force her? Throw her over your shoulder? Drag her out to the car by her ankles?

You can't physically force someone to do something they don't want to do.