The federal government has a new site for caregivers at Medicare.gov. It covers topics such as billing, navigating Medicare, care options and provides resources for caregivers who are feeling overwhelmed. It even has a section on long term care and determining what your choices are for care, and how to pay for it.
The site provides guidance on reading a Medicare coverage summary, and is very clearly laid out. There is also a printable version and a screen reader version to make the information accessible to those who have difficulty using or accessing a computer.