Our Best Hospitals and Best Regional Hospitals rankings apply a methodology to a mix of complicated clinical data, such as survival of certain patients with specific conditions and the numbers of staff nurses per shift separately assigned to inpatients and outpatients, and identifying information, such as hospital addresses.
The accidental omission of Froedtert Hospital from the Best Hospitals in Milwaukee rankings we published July 17 shows that even data in this latter category can be elusive. An outside data provider supplies U.S. News with files that include each hospital's ZIP code, which we use (along with other address data) to determine the county where each hospital is located. Because we define each metro area and region as a set of counties, the ZIP code data is one of many pieces of information we used to determine the 2012-13 metro area rankings. In this case, the ZIP code was missing from the data provided to us, so the hospital went missing from our list of hospitals in Milwaukee.
The hospital has been restored to its proper position, with our apologies. It is one of two hospitals ranked No. 1 in the Milwaukee metro area for 2012-13. The Metro Rank of each of the other four ranked hospitals in the metro area has been corrected to reflect Froedtert's insertion.