Joe Van De Graff, Research Director, KLAS. Provider-owned health plans (payviders) aren’t new, but the payvider market, now permeated with ACOs and new risk-sharing arrangements, is seeing new life and seeking new direction. Which vendors are seen as most critical? Which vendors would clients avoid or replace? KLAS spoke with 44 payviders, approximately one-third of the payvider market, to find out.