Medicare Enrollment by Age Group, 2006 - 2015

Description: The number of people enrolled in Medicare has increased gradually over time. There were 45.7 million beneficiaries in 2006 and 58.3 million beneficiaries in 2015. The age distribution of the population has remained fairly stable over time.

Technical Notes: Age is determined at the end of the calendar year.

Chart Date: December 12, 2017

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Medicare Enrollment by Race, 2006 - 2015

Description: The racial distribution of Medicare beneficiaries has changed very little over time. There are proportionately fewer whites in 2015 compared to 2006 (80.4% versus 85.4%, respectively).

Technical Notes: American Indian, Native American, Other, and Unknown races are grouped together due to small cell sizes. The race variable comes from the CMS Enrollment Database; an additional race classification variable is available in the data files, called RTI Race – which more accurately captures the proportion of Hispanics and Asians.

Chart Date: December 12, 2017

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Medicare Enrollment by Sex, 2006 - 2015

Description: The distribution of Medicare beneficiaries by sex has remained stable over time, with approximately 55% of beneficiaries classified as female.

Technical Notes:

Chart Date: December 12, 2017

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Medicare Enrollment by Coverage Type, 2006 - 2015

Description: The proportion of Medicare beneficiaries enrolled in managed care plans, known as Medicare Advantage (MA) has increased since 2006. The availability of Medicare Part D Prescription Drug coverage in 2006 has revitalized interest in MA. In 2015, 44.8% of Medicare enrollees selected MA plans.

Technical Notes: Full or nearly full fee-for-service (FFS) coverage = 11 or 12 months during the year with Medicare Part A or B coverage, but without managed care any of the months.

Chart Date: December 12, 2017

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Medicare Enrollment by Medicare Status, 2006 - 2015

Description: The proportion of beneficiaries classified as Disabled has been quite stable over time, from 16.4% of beneficiaries in 2006 to 16.0% in 2015.

Technical Notes: Classification used the Medicare status code, and combined end stage renal disease (ESRD) and Disabled categories into the "Disabled" grouping.

Chart Date: December 12, 2017

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Medicare Enrollment by Dual Status, 2006 - 2015

Description: The proportion of beneficiaries classified as dually enrolled in Medicare and Medicaid has increased slightly over time, from 15.6% in 2006 to 16.6% in 2015. The proportion eligible for full dual benefits has changed very little over time (13.0% in 2006 to 12.4% in 2015), however the proportion eligible for partial dual benefits has increased from 2.6% in 2006 to 4.2% in 2015.

Technical Notes: Classification used the state-reported dual status code (variable called DUAL_STUS_CD_MM) to identify beneficiaries dually enrolled in Medicare and Medicaid. Dual coverage was defined as DUAL_STUS_CD_MM = 01, 02, 03, 04, 05, 06 or 08 for 11 or 12 months of the year, or until time of death. A beneficiary was considered a full benefit dual if they had DUAL_STUS_CD_MM = 02, 04 or 08 for a minimum of one month during the year. All other duals were considered partial.

Chart Date: December 12, 2017

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Medicare Enrollment, 2015 by Age Group

Description: The population aged 65-74 years comprises the largest age grouping for beneficiaries (47.6% of all beneficiaries).

Technical Notes: Age at the end of the year.

Chart Date: December 12, 2017

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Medicare Enrollment, 2015 by Racial Group

Description: The white racial group comprises the largest proportion of beneficiaries, by racial group (80.4% of beneficiaries).

Technical Notes: American Indian, Native American, Other, and Unknown races are grouped together due to small cell sizes.

Chart Date: December 12, 2017

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Medicare Enrollment by Age Group and FFS Status, 2006 - 2015

Description: The majority of Medicare beneficiaries are enrolled in fee-for-service (FFS) rather than managed care (i.e., Medicare Advantage [MA]plans). Beginning in 2006, there is a shift toward managed care enrollment, which is more pronounced each year. This is likely due to the implementation of the Medicare Part D prescription drug benefit. Medicare enrollees who were 65-74 years of age were the most likely group to select MA over FFS Medicare. By 2015, the proportion of beneficiaries 65-74 years old who were FFS declined to 49.3%.

Technical Notes: Full or nearly full fee-for-service (FFS) coverage = 11 or 12 months during the year with Medicare A or B coverage, but without HMO (i.e., Medicare Advantage) any of the months.

Chart Date: December 12, 2017

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Medicare Enrollment by Coverage Type and Racial Group, 2015

Description: The racial group with the highest proportion of people with full/nearly full fee-for-service (FFS) coverage was white (57.3%). The next highest group was black (50.0%). For the remainder of racial groups the proportion of non-FFS was higher than FFS.

Technical Notes: Full or nearly full fee-for-service (FFS) coverage = 11 or 12 months during the year with Medicare Part A or B coverage, but without HMO any of the months. American Indian, Native American, Other, and Unknown races are grouped together due to small cell sizes. An additional Race classification variable is available from 2006 forward, called RTI Race – which more accurately captures the proportion of Hispanics.

Chart Date: December 12, 2017

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Medicare Enrollment, 2015

Description: The number of people enrolled in Medicare varied by state. There were a total of 58.3 million Medicare beneficiaries in 2015. Alaska had the smallest number of beneficiaries (88,891), and California had the largest (5,934,641).

Technical Notes:

Chart Date: December 12, 2017

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