Service Tree

The Service Tree lists all services in "branched" groups, starting with the very general and moving to the very specific. Click on the name of any group name to see the sub-groups available within it. Click on a service code to see its details and the providers who offer that service.

Citizenship and Immigration Services Offices

Government offices that provide immigration and naturalization services and benefits, and enforce immigration laws. These offices receive and adjudicate petitions for change of status to or extension of nonimmigrant visa categories, family and employment based petitions leading to immigrant visas, petitions for adjustment of status to lawful permanent residence and petitions for naturalization. They also investigate violations of immigration laws, pursue the removal of aliens thought to have violated those laws, if warranted, provide for the detention of aliens, and manage the removal of persons found to have committed removable offenses as defined by immigration law. The Bureau of Citizenship and Immigration Services (CIS) is part of the Department of Homeland Security (DHS).