http://www.travel.state.gov/content...-passport-from-outside-the-united-states.html
http://santodomingo.usembassy.gov/passports_renewals-e.html
Adult In-Person Passport Renewals
You may obtain a new United States passport using application Form DS-82, provided you meet all four of the following requirements:
IF
1. You have a passport that is not damaged; and
2. It was issued within the past 15 years; and
3. You were at least age 16 when it was issued; and
4. Still have the same name in your most recent passport (or you can legally document your name change)
THEN
You must make an appointment. All U.S. Citizen Services with the exception of adults over 18 applying for their first passport are provided at the Consular Agencies in Punta Cana and Puerto Plata. For your convenience, we recommend that you use the Consular Agencies for services if they are closer to your geographical location. For example, Puerto Plata provides services to Santiago, Sosua, Cabarete, Las Terrenas, Samana and any of the cities along the North Coast. Punta Cana provides services to Bavaro, Higuey, Bayahibe, La Romana and any of the cities along the East Coast. The Agencies tend to have shorter wait times and be less crowded.
If you would like to make an appointment at one of the Consular Agencies, please email Punta Cana Consular Agency or Puerto Plata Consular Agency. If you experience technical difficulties or do not have access to internet, you may make your appointment by calling (809) 552-8990 for Punta Cana or calling telephone numbers (809) 586-8017, (809) 586-4204, (809) 586-8023 for Puerto Plata. In Santo Domingo, you need to make an appointment between the hours of 10:00 a.m. – 11:00 a.m. Mondays or Wednesdays using our online appointment system. It’s very important that you select the first option: "Add visa pages to undamaged, valid U.S. passport" to obtain an immediate appointment confirmation for the above established hours, as we will only be providing adult passport renewal services during those hours. The day of your appointment, bring the following documents with you to the consular section: