Independent Medicare Advantage analytics · Public CMS data · Latest ingest June 15, 2026

Medicare market answers you can defend in the room.

Built on named CMS datasets for brokers planning AEP, strategy and finance teams sizing markets, and analysts who need the source file. Every figure carries its vintage, a provenance panel, a ready-made citation — and a "so what."

What do you want to figure out?

Where is Medicare Advantage gaining or losing share, and how fast? How does a plan or carrier compare on enrollment, stars, and exits? Where is Medicare drug spend and benefit value moving? What does the latest CMS policy change mean for my market? Where are winnable members, and what wins them?

Find your market

Drill from a state to a county. Works without JavaScript — type to filter, or browse the list.

Want the whole country at once? Open the county explorer — filter all 3,199 counties by penetration, momentum and size.

Weighing more than one market? Compare markets side by side →

Alabama 58.5%

67 Alabama counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Alaska 31%

19 Alaska counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Arizona 63.4%4 counties

Pinal 63.2% Pima 61.8% Maricopa 59.4% Coconino 52.6%

Arkansas 56.8%

75 Arkansas counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

California 59.4%10 counties

Los Angeles 64.9% Riverside 63.1% Fresno 62.4% San Bernardino 61.8% San Diego 61.2% San Joaquin 60.8% Sacramento 59.4% Santa Clara 58.7% Orange 57.4% Alameda 56.2%

Colorado 57.8%

64 Colorado counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Connecticut 56.6%

9 Connecticut counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Delaware 60%

3 Delaware counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

District of Columbia 49%

1 District of Columbia counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Florida 64.7%10 counties

Miami-Dade 74.2% Citrus 72.1% Broward 71.8% Palm Beach 70.1% Brevard 68.4% Lake 67.8% Hillsborough 66.4% Orange 64.8% Duval 62.3% Alachua 54.2%

Georgia 59.5%6 counties

Towns 66.4% Richmond 58.2% DeKalb 56.4% Fulton 54.2% Cobb 51.8% Gwinnett 49.6%

Hawaii 41.8%

4 Hawaii counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Idaho 49.7%

44 Idaho counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Illinois 55%6 counties

Winnebago 52.4% Cook 51.4% Will 50.2% DuPage 48.6% Kane 47.8% LaSalle 43.2%

Indiana 60.3%

92 Indiana counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Iowa 50.3%

99 Iowa counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Kansas 51.3%

98 Kansas counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Kentucky 61.4%

120 Kentucky counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Louisiana 59.6%

64 Louisiana counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Maine 44.7%

16 Maine counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Maryland 60.4%

24 Maryland counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Massachusetts 55.4%

14 Massachusetts counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Michigan 57.4%5 counties

Wayne 57.4% Macomb 55.8% Oakland 53.4% Kent 51.8% Benzie 46.2%

Minnesota 54.5%

87 Minnesota counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Mississippi 58%

82 Mississippi counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Missouri 57.9%

115 Missouri counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Montana 48.5%

53 Montana counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Nebraska 51.2%

90 Nebraska counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Nevada 61%

17 Nevada counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

New Hampshire 50.3%

10 New Hampshire counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

New Jersey 57.4%

21 New Jersey counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

New Mexico 60.6%

33 New Mexico counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

New York 55.1%7 counties

Bronx 63.4% Queens 61.2% Kings 58.4% Nassau 57.8% New York 56.9% Suffolk 55.4% Monroe 52.8%

North Carolina 57.9%6 counties

Guilford 54.6% Forsyth 53.2% Mecklenburg 52.8% Durham 51.8% Wake 50.4% Greene 44.8%

North Dakota 54.5%

53 North Dakota counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Ohio 58.6%6 counties

Lucas 58.1% Cuyahoga 57.2% Hamilton 56.4% Summit 55.6% Franklin 54.8% Ashtabula 47.8%

Oklahoma 51.8%

77 Oklahoma counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Oregon 54.4%

36 Oregon counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Pennsylvania 57.8%8 counties

Philadelphia 62.1% Allegheny 58.4% Beaver 56.8% Montgomery 54.8% Bucks 52.6% Chester 51.2% Erie 49.8% Crawford 44.2%

Puerto Rico 82.1%

78 Puerto Rico counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Rhode Island 54.7%

5 Rhode Island counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

South Carolina 59.6%

46 South Carolina counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

South Dakota 50.9%

66 South Dakota counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Tennessee 60.5%

95 Tennessee counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Texas 54.9%8 counties

El Paso 62.8% Bexar 59.1% Galveston 58.4% Harris 57.8% Lubbock 56.8% Dallas 55.4% Tarrant 53.2% Travis 48.4%

Utah 53%

29 Utah counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Vermont 36.8%

14 Vermont counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Virginia 58.3%

133 Virginia counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Washington 56.1%

39 Washington counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

West Virginia 56.2%

55 West Virginia counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Wisconsin 54.3%

72 Wisconsin counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

Wyoming 43.2%

23 Wyoming counties, with April 2026 penetration and 12-month momentum, are in the county explorer. State overview →

This cycle's headline numbers

live static extract curated modeled What these labels mean →

Has Medicare Advantage passed half of Medicare?

static extract

50.8%

Plan year 2026 · +1.2 pts YoY · pure-MA basis

See the trend →

Which counties are gaining MA share fastest?

static extract

+1.35 pts

Miami-Dade, FL → 74.2% · data through Plan year 2026, with 2023–2026 penetration history

Explore counties →

Which carriers are losing stars?

static extract

3.4★

Humana, -0.4 since 2023 · 2026 Star Ratings (published Oct 2025)

See star movement →

What are IRA-negotiated prices saving?

static extract

−$9,141

per fill, Stelara (ustekinumab) · CY2026 MFP, effective Jan 2026

See the drug list →

New in the data CMS Medicare Monthly Enrollment — February 2026 ingested June 15, 2026. Notable: national MA+other share at 57.8%; Puerto Rico leads states at 82.1%. Read the release briefing →

Start from your task

Jump straight to the answer set that matches the work in front of you.

Strategy & corp devI'm evaluating a market entryCounty momentum + penetration runway, CSV-ready Payer strategyI'm benchmarking plansStar trajectories, measure erosion, exit signals Market accessI'm sizing drug-spend impactIRA negotiated prices and the OOP-cap shift Finance & diligenceI'm prepping a board deckThe citable national picture with basis notes Brokers & field salesI'm planning AEP territoriesContestable members, runway class, battlecards, CSV-ready AnalystsI need the underlying tablesVersioned CSV downloads with the same vintages as the charts

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Built to be cited

Most Medicare stats you'll find online are undated and unsourced. Everything here is engineered so you can put it in front of a client, a CFO, or a diligence committee.

Named sources & vintages

Every figure names its CMS file and states its data vintage — Monthly Enrollment, CPSC, Star Ratings, Part D parameters. No undated charts, anywhere.

Provenance on every chart

An expandable panel under each figure: method, basis notes, limitations, and a link to the exact CMS source file.

Honest status labels

Live pulls, static extracts, curated notes, and modeled series are labeled apart — so you know exactly what kind of number you're quoting.

So what / Now what

Each answer ends with what the number means and the concrete next moves — pre-formatted citation included, ready for your deck.

Monthly enrollment ingests · annual stars (Oct) and Part D parameters (Apr) · Methodology, source registry & limitations · Who runs this →