My 66-year-old mother needs to see a doctor as soon as possible, but has no income or assets. How can I get Medicare for her?

She is old enough for Social Security, so if she's enrolled she has Medicare A, but the is hospital and care of that sort. Medicare B has a premium, but she would be eligible. Check with your state insurance department for help. She could quality for SSI - check out http://www.socialsecurity.gov/pgm/links_ssi.htm for low income people.
Good luck.
Carol