The Centers for Medicare and Medicaid Services provides an online tool to determine eligibility for Medicare coverage. After entering the applicable information, the site describes whether you are eligible for Medicare Part A, Part B and Part C, explains the Centers for Medicare and Medicaid Services.
From the Eligibility and Premium Calculator page, click the Find Out if I'm Eligible button. Select your date of birth, and indicate whether you have worked for at least 10 years for which you paid Medicare taxes. Also indicate whether you live in the United States or one of its territories, whether you get group health benefits through your or your spouse's current employer and whether you're already enrolled in Medicare part A. After clicking the Next button, the site discusses your Medicare enrollment eligibility, according to the Centers for Medicare and Medicaid Services.
If you meet the eligibility age and you or your spouse paid Medicare taxes during at least 10 years of work, you are eligible for Medicare Part A insurance free of premiums. Part A coverage is for hospital insurance. Additionally, if you meet the eligibility requirements for Part B insurance, you may be required to pay a monthly premium. Medicare Part B coverage is for medical insurance, and the average monthly premium is $104.90 in 2015, according to the Centers for Medicare and Medicaid Services. Alternatively, you may be eligible for Medicare hospital and medical insurance coverage through Part C, which is a Medicare Advantage Plan offered through private insurers.