Reform of the governmental public health system in the United States has been stymied by changes in political, economic, and medical care landscapes since public health was called to action by the Institute of Medicine report in 1988. Despite a new national health objective calling for 90 percent of the population to be served by a local health department effectively addressing public health's three core functions by the year 2000, capacity building initiatives have not been deployed extensively, and there is little likelihood of reaching the year 2000 objective. A national program of accrediting local and state health departments could energize public health capacity building. Accreditation would build on recent initiatives in states like Washington and Illinois, promote wider use of the Assessment Protocol for Excellence in Public Health, and facilitate reform of the public health system around public health's core functions. Key questions addressing the why, how, and who of such an initiative set the stage for consideration of a national accreditation program.