The National Hospital Care Survey (NHCS) is a national sample survey of visits made to non-federal, non-institutional hospitals with at least six beds staffed for inpatient use. Starting in 2011, the sample hospitals have been asked in each year, except 2017, to submit electronic records for all visits made to them for medical care that year in each of three hospital departments: inpatient, emergency, and outpatient. The rate for hospitals submitting visit records grew to just under 30 percent in 2016, the most recent year for which data are currently available for estimation. While there is interest in estimates based on that data, there is also concern about the potential for bias in those estimates due to the low response. An assessment of the nonresponse in the 2016 NHCS estimates is the subject of this paper.