Information about the USCIS can be found on their web site. Information is also available by calling the toll free telephone number: 1.800.375.5283. Customers must go online to schedule an appointment prior to going into the Baltimore office for service. See web site below for instructions. The web site also offers the ability to check case status. The Baltimore field office is located at:

Fallon Federal Building 31 Hopkins Plaza Baltimore, MD 21201