The constant thread throughout the treatises is a reliance on nature. The physician's chief function is to make conditions propitious for the natural forces in the body to reach harmony and therefore health. Even in the surgical treatises the focus is always on restoring.
When you work and pay Social Security taxes, you earn credits toward Social Security benefits. To qualify for Medicare at age 65, you need 40 credits or 10 years of work. You may qualify for Medicare through your own earnings history, your current spouse, former spouse or deceased spouse.
The basic rule: apply for Medicare when you turn 65. There is an open enrollment period which starts 3 months prior to the month you turn 65 and extends 3 months past the month you turn 65 (a 7 month window). If You Already Receive Social Security Benefits.