Traveler's Medical Service-New York, NY and Washington DC Centers of excellence in travel and tropical medicine. For over 30 years, travelers, health care providers and corporations have been relying on Traveler's Medical Service as the expert resource for a full range of travel medicine services. Services offered include: travel vaccinations, expert pre-travel health consultations and malaria advice. Post travel medical care and tropical medicine. Specialized advice and services for traveling families, children and students. Corporate programs.