Medicare Monthly Enrollment by Geographic Area and Coverage Type

Monthly data on Medicare beneficiary enrollment for national, state, and county levels. It details counts for hospital/medical coverage and prescription drug coverage, with breakdowns by plan type such as Original Medicare, Medicare Advantage, and stand-alone Prescription Drug Plans. The dataset tracks monthly and yearly enrollment trends.

Use Cases

• Analyze enrollment trends in Medicare Advantage Prescription Drug plans versus stand-alone Prescription Drug Plans across different states and counties.
• Model monthly beneficiary counts for hospital/medical coverage segmented by Original Medicare and Medicare Advantage to forecast healthcare service demand.
• Assess geographic disparities in prescription drug coverage enrollment to inform health equity initiatives at the county level.
• Track yearly enrollment changes in Medicare Advantage and Other Health Plans to evaluate market penetration and policy impact.

Strengths

• Provides geographic granularity down to the county level for beneficiary counts.
• Includes breakdowns by key plan types: Original Medicare, Medicare Advantage, and prescription drug coverage categories.
• Offers both monthly and yearly temporal views for tracking enrollment trends.

Limitations

• Unknown total record count and dataset size limits analytical planning.
• Lack of column-level metadata prevents understanding of specific data fields and relationships.
• Potential for geographic bias if enrollment reporting is inconsistent across all counties.

Provenance

Source

U.S. Department of Health & Human Services

Collection Method

Administrative enrollment records aggregated monthly.

Time Range

Monthly time series, specific start date unknown.

Freshness

Updated monthly, with a recent update in February 2026.

Geography

United States, including national, state/territory, and county levels.