Consider taking the time to sign up for the Smart Traveler Enrollment Program prior to your trip. The program will keep you informed about safety and security announcements and can better assist you incase of an emergency.
You can visit the U.S. embassy in Argentina at the following address:
U.S. Embassy Buenos Aires
Av. Colombia 4300
(C1425GMN) Buenos Aires, Argentina
Telephone: +(54) (11) 5777-4533
Emergency after-hours telephone: +(54) (11) 5777-4873 and during working hours +(54)(11) 5777-4354
Fax: +(54) (11) 5777-4240
Be sure to visit the U.S. State Department website before traveling to Argentina to confirm you have the most up to date information for the U.S. Embassy and Consulate.