Last fall the Centers for Disease Control released new guidelines for HIV testing that suggest expanded routine testing in healthcare settings. The goal is to reach the 25% of HIV-positive Americans who do not know their status. Since then, concerns have been raised about the resources available to implement the plan; treatment and care resources for those who may test positive; and changes to prevention counseling for people who test negative. Chairman Waxman writes to CDC Director Julie Gerberding to request analyses of these issues and details about the implementation of the new guidelines to date.