Can senior citizens with green cards and no taxes check their dental insurance package?

Not included.

You definitely need to buy insurance. Generally, commercial insurance is purchased. Regarding medical insurance, according to U.S. law, new immigrants who do not have working experience in the United States or have not paid Medicare taxes for more than ten years are reminded that new immigrants cannot automatically qualify for Medicare medical insurance when they arrive in the United States.

New immigrants must have held a green card for more than five years and are over 65 years old before they can pay insurance premiums to the government’s Medicare project to purchase medical insurance plan A, which is hospitalization insurance.