One Medical announced that it had received an investment of up to $350 million from Carlyle Group. : One Medical CEO Amir Rubin told CNBC on Friday the primary-care organization's recent investment from private equity firm Carlyle Group will help it reach its goal of decreasing overall health-care spending in the U.S. On Wednesday, One Medical announced that it had received an investment of up to $350 million from Carlyle Group. Rubin said use of the new funds will include doubling its office space, expanding its membership footprint and aggressively hiring more medical professionals.