They are also called an intermediary. The decision made by an FI or a carrier under medicare part A or part B is called the local coverage determination (LCD).
The Lower Mantle, which is 49.2% of the Earth's mass.
How many percents of Earth's mass are water? I seem to remember some 3 percents, but I don't know. And how much more would it have to be to submerge all the continents including Mount Everest in the ocean?