In Waves 1-4 of the 2014 SIPP Panel, a processing error generated incorrect universes for the Medicare deduction flags (ESSPARTBYN, ESSPARTCYN, and ESSPARTDYN). The processing of these deduction flags referenced the wrong indicators of Medicare receipt, so the Medicare deduction variables are in universe for some respondents that did not receive the corresponding Medicare benefits. These errors were corrected for 2018 SIPP, but problems remain in the 2014 Panel.