20 CFR § 418.1322 - How will a Medicare prescription drug coverage income-related monthly adjustment amount determination for the effective year affect your Medicare Part B?

---
identifier: "/us/cfr/t20/s418.1322"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "20 CFR § 418.1322 - How will a Medicare prescription drug coverage income-related monthly adjustment amount determination for the effective year affect your Medicare Part B?"
title_number: 20
title_name: "Employees' Benefits"
section_number: "418.1322"
section_name: "How will a Medicare prescription drug coverage income-related monthly adjustment amount determination for the effective year affect your Medicare Part B?"
chapter_name: "SOCIAL SECURITY ADMINISTRATION"
part_number: "418"
part_name: "MEDICARE SUBSIDIES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
regulatory_source: "70 FR 77675, Dec. 30, 2005, unless otherwise noted."
cfr_part: "418"
---


# 418.1322 How will a Medicare prescription drug coverage income-related monthly adjustment amount determination for the effective year affect your Medicare Part B?

If we make an income-related monthly adjustment amount determination for you for the effective year under subpart C of this part (Medicare Prescription Drug Coverage Income-Related Monthly Adjustment Amount), we will apply that income-related monthly adjustment amount determination under this subpart to determine your Part D income-related monthly adjustment amount for the same effective year. Therefore, if you become enrolled in Medicare Part B in the effective year after we make an income-related monthly adjustment amount determination about your Medicare prescription drug coverage, the income-related monthly adjustment amount determination for your Medicare prescription drug coverage will also be used to determine your Medicare Part B income-related monthly adjustment amount. Any change in your net benefit due will be accompanied by a letter explaining the change in your net benefit and your right to appeal the change.

[75 FR 75890, Dec. 7, 2010]