Section 418.2125 - How will the income-related monthly adjustment amount affect your total Medicare prescription drug coverage premium?(a) If you must pay an income-related monthly adjustment amount, your total Medicare prescription drug coverage premium will be the sum of: (1) Your prescription drug coverage monthly premium, as determined by your plan; plus(2) Any applicable increase in the prescription drug coverage monthly premium as described in 42 CFR 423.286 ; plus(3) Your income-related monthly adjustment amount.(b) Regardless of the method you use to pay your Medicare prescription drug coverage premiums to your Medicare prescription drug coverage plan, you will pay any income-related monthly adjustment amount you owe using the method described in 418.2112.