Capitate in a sentence as a noun

GPs are capitated, they are paid by how many patients are enrolled on their roster.

You're right - for specialists and some GPs but not all. About half of the GPs are paid by their roster size, so-called "capitated payment".

Capitate in a sentence as an adjective

That's called a "capitated" payment plan, and we already use those on a lot of contracts with physicians.

Unless you are a member of a system like Kaiser, you are most likely covered by a plan that is partially capitated - your insurer may share profits over a certain % with your doctor as a reward for keeping you healthy, but still pays for services on a FFS basis.

Capitate definitions

noun

the wrist bone with a rounded head shape that articulates with the 3rd metacarpus

adjective

being abruptly enlarged and globose at the tip