The Medicare Part B premium amount (ESSPARTBKNOW), which is deducted from Social Security income, was incorrectly capped in the 2025 SIPP public-use file at $515. It was intended to be capped at $594, which is the maximum possible Medicare Part B deduction. Data users should be aware of this issue when analyzing Social Security data and Medicare premiums. Refer to https://www.cms.gov/newsroom/fact-sheets/2024-medicare-parts-b-premiums-and-deductibles for more information on these values.

Table 1 lists the SSUIDs, PNUMs, and correct ESSPARTBKNOW values for cases that should not have been top-coded. Table 2 lists the SSUIDs, PNUMs, and correct values for the cases that should have been top-coded at $594.

The U.S. Census Bureau has reviewed this data product to ensure appropriate access, use, and disclosure avoidance protection of the confidential source data to produce this product (Data Management System (DMS) number: P-7516454; Disclosure Review Board (DRB) approval number: CBDRB-FY26-0364.