Both of my parents had Medicare before age 65 because they were disabled and on SSD so I know that sometimes happens prior to age 65. From the Social Security site:
http://www.socialsecurity.gov/pubs/10029.html#part10 You will get Medicare coverage automatically after you have received disability benefits for two years.
Michigan's Medicaid website says this: Aged, Blind, Disabled
Medicaid is available to persons who are aged, blind, or disabled. There are income and asset tests. If the income is over the income limit, persons may incur medical expenses that equal or exceed the deductible and still qualify for this program. Most beneficiaries are enrolled in a Medicaid health plan and receive a comprehensive package of health care benefits including vision, dental, and mental health services. Contact the local MDHS office in your county to apply for this program.
http://www.michigan.gov/mdch/0,1607,...00.html#Adults