This paper analyzes nine health policy votes in the U.S. House of Representatives. The votes all occurred between 1973 and 1980 and include such issues as health planning, health maintenance organizations, cost containment, and professional standards review organizations. The objective of this analysis is to examine the independent contribution of variables indigenous to health issues while controlling for party identification and ideology. The influence of health providers, measured by the effect of the number of state medical association members in each state, is significant in the findings. The state and local share of Medicaid expenses is also significant in explaining several votes. Contributions from political action committees were not important until 1979, when the rising costs of campaigns gave them more influence, and when our measures of their influence improved. By the time Congress voted in 1979 on hospital cost containment legislation, the PAC variable surpassed even the AMA variable in importance.