The oncology software developer has now raised $138m, following a second consecutive round led by Google Ventures, and will shortly acquire Altos Solutions.

Google Ventures, the corporate venturing arm of internet company Google, has led a $130m series B round raised by Flatiron Health, the US-based developer of a software platform for clinical cancer data.

Medical testing company Laboratory Corporation of America and venture capital firm First Round Capital, both of which like Google were investors in Flatiron’s January 2013 series A round, also participated in the round.

Andrew Conrad, a director at Google X, will join Google Ventures general partner Krishna Yeshwant…