Requirements to visit Italy

Greetings from Mexico.

I am planning a trip to Italy, it will be my first trip to Europe with a duration of 6 days. I have been researching about the requirements that I must meet in order to make this trip. I found that I do not need visa, but I also found that I must have international medical insurance with a minimum coverage of € 30,000 for emergency hospitalization expenses and repatriation costs, which I do not have. The question is: Is the international medical insurance really a mandatory requirement?

Thanks.