Earlier this week, news surfaced that some HealthCare.gov users may have received an incorrect subsidy or Medicaid eligibility determination from the Marketplace. According to reports, HealthCare.gov has been counting Social Security income received by children when calculating the Modified Adjusted Gross Income (MAGI) for a household. Once calculated, MAGI is then used to help determine a household’s eligibility for Medicaid or subsidized private insurance. By including a child’s Social Security Income in a household’s income, the Federally-facilitated Marketplace (FFM) likely increased the overall household income, which could have resulted in some persons either not qualifying for Medicaid or an inaccurate tax credit determination. While CMS has acknowledged the error, the agency has so far not given an indication of how many households may be impacted.