The health insurance covers the costs of medicines, hospital care and transport home. Tourists will also be able to claim legal help if, for example, they are robbed.
Mexico City, like the rest of the country, has been hard hit by the outbreak of Mexican flu in April. The H1N1 virus has now claimed 138 lives and infected almost 15,000 people. Tourist visits have fallen sharply.
Mexican authorities stress, however, that the outbreak is now under control.