The Rockefeller Foundation (RF) began its work on the American-colonized Philippine Islands in 1913. Engaging mainly in health and sanitation work, it built a strong partnership with the American insular government there and continued its charitable work long after Philippine independence in 1946. During this, my second trip to the RAC, I continued my research from 2010. Looking specifically at the years between 1923 and 1932, I explored the RF's role in a profound shift in discourses of health and national development. In that decade, RF programming helped transform Filipina women into stewards of Filipino health by replacing male sanitary health inspectors with public health nurses. In so doing, they made Filipina women central to debates about Filipino nationhood.