How Do You Become Eligible For Medicare? 
Most people become eligible for Medicare at age 65 but there are some situations where someone under 65 can receive Medicare , as well . 1 -RRB- If you have a disability and have been receiving SSDI for more than 24 months , you will automatically be enrolled in Medicare in the 25th month . 2 -RRB- If you have been diagnosed with End Stage Renal Disease , are on kidney dialysis or had a kidney transplant , and a number of other qualifying factors , you are eligible to receive Medicare . Speak to a representative for details as there are many qualifications involved . 3 -RRB- You have ALS and have enrolled for SSDI . Note : Railroad workers will have some different stipulations . For all of the above , contact Social Security at 800-772-1213 for accurate and up to date information . 