An International Health Insurance policy will typically calculate premiums based on a policyholder's age, current medical history, and area of coverage, rather than on their claims history. These plans usually offer one of two areas of coverage: Worldwide; or Worldwide excluding the USA (other countries may be excluded as well). The reason for this is that medical care in the USA is the most expensive in the world, but most international insurance companies will rank countries by medical costs and have premiums adjusted accordingly.