2027 open enrollment. 3.15M must pick a new plan.

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For everyone who works with the data · the platform

Every Medicare Advantage dataset we hold.

Query any of them from your own AI through the connector, open them in Studio, or ask for the file. Sign in and they are in your workspace.

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DatasetYearsTablesRowsUpdatedPublisherUse it
Part D Plans & FormulariesMedicare Part D plans and formularies from CMS's quarterly Part D files, 2019-Q1 to 2026-Q2: which plans cover a drug, at what tier and with what prior authorization, step therapy or quantity limits, member cost sharing, plan list unit costs and service areas, plus legacy Part D benefit detail from plan benefit filings. Prices are list unit costs, not net of rebates.2019-2026101.65Bquarterly / annualCenters for Medicare & Medicaid ServicesQuery · Studio · File
Medicare Advantage & Part D EnrollmentHow many people are enrolled in each Medicare Advantage and Part D plan, tracked month by month down to the county level, back to 2006. The core measure of plan size, market share, and enrollment growth or decline.2006-20264613.7MmonthlyCenters for Medicare & Medicaid ServicesQuery · Studio · File
Medicare Part D Prescriber UtilizationPrescriber-level Medicare Part D utilization and drug-spending evidence by provider and product.2013-20241304.3MannualCenters for Medicare & Medicaid ServicesQuery · Studio · File
Medicare Advantage & Part D Plan LandscapeThe consumer-facing snapshot of every Medicare Advantage and Part D plan each year: premium, drug deductible, out-of-pocket maximum, star rating, and where the plan is offered. Includes Dual-Eligible Special Needs Plan (D-SNP) details such as plan type, integration status, and zero-dollar cost sharing.2006-20265147.1Mannual / derivedCenters for Medicare & Medicaid ServicesQuery · Studio · File
Medicare Advantage Plan Benefit Packages (PBP)The complete benefit design of every Medicare Advantage plan: the copays, coinsurance, deductibles, and coverage limits for every service, from inpatient hospital to ambulance, dental, vision, and hearing, plus optional supplemental benefits. Exactly what a plan covers and what a member pays out of pocket. Plan filings 2001 to 2027 (the 2027 filings are loaded); Plan Finder summaries 2020 to 2026.2001-2027328.4MannualCenters for Medicare & Medicaid ServicesQuery · Studio · File
Medicare Advantage HEDIS QualityThe HEDIS clinical quality measures behind Medicare Advantage star ratings, reported per contract: preventive screening, fall-risk management, readmissions, emergency use and other care-quality outcomes. Report years 2019 and 2021 to 2025 (CMS published no 2020 file); the report year is the publication year, measured one year earlier.2019, 2021-202594.8MannualCenters for Medicare & Medicaid ServicesQuery · Studio · File
Medicare Advantage Star RatingsCMS's one-to-five star ratings for Medicare Advantage and Part D contracts, rating years 2007 to 2026, with per-measure values and stars, cut points, the Categorical Adjustment Index and a cross-year measure crosswalk. For 2027 only CMS's preview cut points are held; 2027 contract ratings are not yet in the table.2007-2026; 2027 preview cut points9759.1KVaries by publisher release / annualCenters for Medicare & Medicaid ServicesQuery · Studio · File
Medicare Advantage Plan PaymentsThe money side of Medicare Advantage, 2006 to 2024: CMS's average payment per member per month, average risk scores and rebates by contract, plan and county, plus contracts' medical loss ratio filings. Payment values are averages (weight by member-months). Plan bid data is not included.2006-20244387.7KannualCenters for Medicare & Medicaid ServicesQuery · Studio · File
CMS-HCC Risk Adjustment ModelThe diagnosis-to-HCC mappings and model coefficients used to translate member conditions into Medicare Advantage risk scores, rate years 2016 to 2027 across model versions (V21, V22, V24, V28, RxHCC). Pin the rate year and model version.2016-20272341.8KannualCenters for Medicare & Medicaid ServicesQuery · Studio · File
Medicare Plan CrosswalksThe year-to-year lineage of Medicare plans: which plans merged, were renamed, or terminated. The thread that lets enrollment be followed cleanly across plan-year boundaries.2006-20261144.4KannualCenters for Medicare & Medicaid ServicesQuery · Studio · File
Medicare Part D Spending by Drug (PUF)Annual Medicare Part D spending, claims, and beneficiary counts for each drug, with how unit costs move year over year. The big-picture view of which drugs drive Part D dollars.2019-2023160.7KannualCenters for Medicare & Medicaid ServicesQuery · Studio · File
Medicare Advantage County RatebookWhat CMS pays a Medicare Advantage plan per member in each county, by the county's quality-bonus tier. The revenue starting point behind every Medicare Advantage plan's economics.2015-2027142.2KannualCenters for Medicare & Medicaid ServicesQuery · Studio · File

Counts read from the catalog on the day the page was built. A file is sent on request; downloads from the page follow.

The packages

Built from the data, ready in one call.

The county view

One county, every plan on sale: enrollment, benefits, stars, exits, by year.

connector: get_county_view

The contract profile

One contract or plan in one call: stars, benefits, enrollment, service area.

connector: get_contract_profile

Star risk scores

Every contract's distance from the 4.0 line, measure by measure, with the cut points.

connector: get_star_risk

Plan Value by plan and year

What each plan's filed design is worth to a member, in dollars a month, 2026 and 2027.

connector: get_plan_value

The engines

The same engines, when you want them.

Plan Switch

Live, free

Every 2027 plan change, by county: who leaves, who stays, where the members can go.

Anyone: plans, brokers, members, press. Open it. No sign-in.

Stars engine

Live in Alpha

Every measure against the cut points, what moves a rating, and what a step is worth.

Stars, quality and finance teams at a plan; their consultants. Through Alpha, on your own contracts.

Plan Value

In review

What a plan's filed design is worth to a typical member, in dollars a month, next to every competitor's.

Product and actuarial teams; the actuaries who build bids. In review with our founding actuary; served through the connector for 2026 and 2027.

Bid Lab

Design partners

Change your design, set what competitors might do, and see the county move: members and money, with reasons.

Plans building the 2028 bid; the consultants who build it with them. Design partners for the 2028 cycle, now until February.