OneCare Vermont officials present their budget proposal to the Green Mountain Care Board in October 2019. From left: Vicki Loner, CEO; Tom Borys, vice president of finance and Sara Barry, COO. Photo by Mike Dougherty/VTDigger OneCare, the nonprofit that distributes millions of public and private health care dollars to providers throughout Vermont, has asked state regulators to greenlight a $15 million operating budget — a slight decrease from this year — as part of an annual review process.  This is the first OneCare budget cycle for most members of the Green Mountain Care Board, the five-member body that regulates major players in Vermont’s health care sector, including hospitals. And the…