Societies representing physician specialties and other health care personnel commonly have political action committees (PACs). These PACs seek to advance their members' interests through advocacy and campaign contributions. We examined contribution data for health care workers' PACs from the 2010 to 2012 election cycles and found that higher annual income was strongly associated with greater giving to Republican candidates. Patterns of giving may offer insights into various medical workers' party preferences, political leanings, and views of health care reform.