the united states national health care act, or the expanded and improved medicare for all act () is a bill introduced in the united states house of representatives by representative john conyers (d-mi). the bill had 49 cosponsors in 2015. as of august 12, 2017, it had 116 cosponsors, which amounts to a majority of the democratic caucus in the house of representatives and is the highest level of support the bill has ever received since conyers began annually introducing the bill in 2003.