There are no Medicare Part D plans that are totally "free" to low-income Medicare beneficiaries.
However, if a Medicare beneficiary is eligible for both Medicare and Medicaid (dual eligible) or receives "full" extra-help or the Low-Income Subsidy (LIS), then they will find that each State has several Medicare Part D plans that qualify for the $0 monthly premium.
If you wish to see the Medicare Part D plans in your State that qualify for the $0 monthly premiums, you can use our PDP-Finder (here is an example for South Carolina):
Also people who qualify for the full Low-Income Subsidy will have their prescription medications covered by a Medicare Part D plans at a very low price: For instance, in 2010, the co-payment is $2.50 for generic medications and $6.30 for brand name medications - or 5% of the cost of the drugs, whatever is greater.
If someone is over the "full" Extra-Help limits, they may still take advantage of lowered monthly premiums (although not $0) and also reduced prescription drug co-payments - depending on their financial resources.
If someone wishes to apply for the Extra-Help program, they can contact their local Medicaid office or the Social Security Administration at: 1-800-772-1213.