Many people don't realize that about 20% of Medicare beneficiaries are eligible for both Medicare and Medicaid.

On July 30, 1965, President Lyndon Johnson signed the laws that created Medicare and Medicaid as part of his Great Society programs to address poverty, inequality, hunger and education issues.

– Medicare is a federal program that provides health care coverage for people aged 65 or older, and younger people with disabilities, amyotrophic lateral sclerosis or end-stage renal disease, regardless of the person’s income.

Medicare offers essentially the same coverage and costs everywhere in the United States and is overseen by the Centers for Medicare & Medicaid Services, an agency of the federal government.

CMS says that most people on Medicare do not have to pay a premium for Part A, but everyone must pay a premium for Part B.

Medicaid is a government assistance program administered by both the federal government and state governments. As such, its rules of coverage and cost vary from one state to another.

Medicare would be your primary insurance payer, says Diane Omdahl, president and founder of 65Incorporated, a Medicare consulting firm. If you also qualify for Medicaid, that becomes your secondary payer.

The devil is in the details," Fassieux says. She also recommends talking to a local broker, Medicare advocate or a SHIP representative.