That was a prediction CDC made in early Feb for broader China. More recent CDC reports for United States (https://www.cdc.gov/mmwr/volumes/69/wr/pdfs/mm6912e2-H.pdf) say mortality is somewhere between 1% (lower bound) and ~30% (depending on age) based on calculations they did w/ cases having "known outcomes". The CDC says they only have 44 such samples at this time, and that ICU status data is missing or unknown for the several thousand or so other cases. So we really just don't know the facts yet.