2025 Medicare Part D Prescription Drug Plans: Overview by CMS Region

As required under the Medicare Modernization Act, the Centers for Medicare and Medicaid Services ("CMS") established geographic regions for the administration of stand-alone Medicare Part D prescription drug plans ("PDPs"). CMS established 34 PDP regions consisting of the 50 states and the District of Columbia, as well as 5 separate PDP Regions for the United States territories.

Please note - Medicare Part D Plans vary in cost and coverage by Region - this means that if you move to a State in a different region during the enrollment year, you may pay a different premium and/or possibly may not have access to the same selection of Medicare Part D plans. If you do move to a new region during the plan year, you are granted a Special Enrollment Period (SEP) and are permitted by CMS to change Medicare Part D plans even if your old plan is available in your new region.

Select your state below or choose from one of these links to other tools available to review 2025 Medicare Part D Plans:

• 2025 Medicare Part D Plan Finder:  Search by plan features and premiums across all Medicare Part D plans or Medicare Advantage in your state.
• 2025 Formulary Search by Drug:  Select a drug and compare coverage for all Medicare Part D plans in your state.
• 2025 Formulary Browser:  Browse through any Medicare Part D plan’s formulary (or Drug List).
• 2024/2025 Medicare Part D Plan Comparison:  Compare annual changes for all Medicare Part D plans or Medicare Advantage in your state.
• 2025 PDP-Facts:  Interactive overview of the annual Medicare Part D Landscape.

The Centers for Medicare and Medicaid Services (CMS)
Prescription Drug plan (PDP) Regions

Region 1	Maine, New Hampshire	Region 18	Missouri
Region 2	Connecticut, Massachusetts, Rhode Island, Vermont	Region 19	Arkansas
Region 3	New York	Region 20	Mississippi
Region 4	New Jersey	Region 21	Louisiana
Region 5	District of Columbia, Delaware, Maryland	Region 22	Texas
Region 6	Pennsylvania, West Virginia	Region 23	Oklahoma
Region 7	Virginia	Region 24	Kansas
Region 8	North Carolina	Region 25	Iowa, Minnesota, Montana, Nebraska, North Dakota, South Dakota, Wyoming
Region 9	South Carolina	Region 26	New Mexico
Region 10	Georgia	Region 27	Colorado
Region 11	Florida	Region 28	Arizona
Region 12	Alabama, Tennessee	Region 29	Nevada
Region 13	Michigan	Region 30	Oregon, Washington
Region 14	Ohio	Region 31	Idaho, Utah
Region 15	Kentucky, Indiana	Region 32	California
Region 16	Wisconsin	Region 33	Hawaii
Region 17	Illinois	Region 34	Alaska
The US Territories:
Region 35	American Samoa	Region 38	Puerto Rico
Region 36	Guam	Region 39	Virgin Islands of the US
Region 37	Northern Marina Islands

Other tools available to review 2025 Medicare Part D Plans:

• 2025 Medicare Part D Plan Finder:  Search by plan features and premiums across all Medicare Part D plans or Medicare Advantage in your state.
• 2025 Formulary Search by Drug:  Select a drug and compare coverage for all Medicare Part D plans in your state.
• 2025 Formulary Browser:  Browse through any Medicare Part D plan’s formulary (or Drug List).
• 2024/2025 Medicare Part D Plan Comparison:  Compare annual changes for all Medicare Part D plans or Medicare Advantage in your state.
• 2025 PDP-Facts:  Interactive overview of the annual Medicare Part D Landscape.