20 CFR §418.3505

1. (a)An increase in your subsidy means that you would be able to pay a lower premium to participate in the Medicare Part D prescription drug program. An increased subsidy may also result in a reduction in any deductible or copayments for which you are responsible.
2. (b)A reduction in your subsidy means that you would have to begin to pay a premium or a higher premium to participate in the Medicare Part D prescription drug program. You may also have to begin to pay a deductible and higher copayments or increase the amounts of these payments.
3. (c)A termination means that you would no longer be eligible for a subsidy under the Medicare Part D prescription drug program.