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.
For most people, Medicare starts the 1st day of the month you turn age 65. You can sign up for Medicare Part A & B which covers about 80% of the costs of care. You can also sign up for a Medicare Supplement plan (Medigap) to cover the difference.