For General information you may well want to get a copy of The Lonely Planet Guide to Argentina. It is quite reliable.

Hospital Alemán: Av. Pueyrredón 1640
phone: 4827-7000.

Hospital Británico: Perdriel 28 y Avenida Caseros
phone: 4309-6500

Canadian Embassy Tagle 2828
phone: 4808-1000