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Medicare Supplementary Medical Insurance

Program Information

Popular name

(Medicare Part B)

Program Number

93.774

Program objective

To provide medical insurance protection for covered services to persons age 65 or over, to certain disabled persons and to individuals with end-stage renal disease. Enrollment in Part B is voluntary.

Program expenditures, by FY (2023 - 2025)

This chart shows obligations for the program by fiscal year. All data for this chart was provided by the administering agency and sourced from SAM.gov, USASpending.gov, and Treasury.gov.

For more information on each of these data sources, please see the About the data page.

Additional program information

  1. 2016

    In fiscal year 2016, the number of enrollees is estimated to be 56,646,000. The source for the number of Medicare beneficiaries is the FY 2017 MSR. In fiscal year 2016, the number of enrollees is estimated to be 56,482,000. The source for the number of Medicare beneficiaries is the FY 2018 MSR.

  2. 2017

    In fiscal year 2017, the number of enrollees is estimated to be 58,066,000. The source for the number of Medicare beneficiaries is the FY 2019 MSR.

  3. 2018

    N/A

Single Audit Applies (2 CFR Part 200 Subpart F):

For additional information on single audit requirements for this program, review the current Compliance Supplement.

OMB is working with the U.S. Government Accountability Office (GAO) and agency offices of inspectors general to include links to relevant oversight reports. This section will be updated once this information is made available.

Code of Federal Regulations, Title 20, Parts 401, 405, and 422; Title 42, Parts 401, 405, 407, 408, 410, 413, 416, and 417. "Your Medicare Handbook," and other publications are available from any Social Security Office without charge.

  1. Social Security Act Title XVIII, Section 1831.

Program details

Program types

Eligible beneficiaries

  • Disabled (e.g. Deaf, Blind, Physically Disabled)
  • Individual/Family
  • Mentally Disabled
  • Pension Recipient
  • Physically Afflicted (e.g. TB, Arthritis, Heart Disease)
  • Senior Citizen (60+)

Additional resources