Last year I published a study with the Mercatus Center projecting that enacting Medicare for All (M4A) would add at least $32.6 trillion to federal budget costs over the first 10 years. After the study was published, some advocates misattributed a finding to it, specifically that M4A would lower national healthcare costs by $2 trillion over that same time period. This misattribution has since been repeated in various press reports. Multiple fact-checking sites have pointed out that the study contains no such finding, as did a follow-up piece I published with e21 last year. However, because the mistake continues to appear occasionally, this article provides additional detail about how and why it is wrong.