Hospital admissions due to sickle cell trait/anemia had the highest readmission rate within 30 days in 2018, representing more than one in three adult hospitalizations (36 percent).
This Healthcare Cost and Utilization Project (HCUP) Statistical Brief – Overview of Clinical Conditions With Frequent and Costly Hospital Readmissions by Payer, 2018 – presents statistics on hospital inpatient conditions with high frequency and cost of readmissions among adults (aged 18 years and older) by expected payer using the 2018 Nationwide Readmissions Database (NRD). A readmission was defined as a subsequent hospital admission for any cause within 30 days following an initial stay (index admission) between January and November 2018. Three readmission metrics are presented overall and by expected payer: (1) conditions with the highest number of readmissions, (2) conditions with the highest readmission rate, and (3) conditions with the highest average readmission cost. The expected payer and condition (principal diagnosis) are based on the index admission. Index admissions for cancer and cancer-related therapies are included in overall readmission statistics but are not reported in condition-specific statistics.
In 2018, there were 3.8 million 30-day all-cause adult hospital readmissions, with a 14 percent readmission rate and an average readmission cost of $15,200. Index (initial) admissions for septicemia accounted for the largest number of readmissions overall (8.3 percent) and by expected payer. Septicemia also had among the highest average readmission costs for Medicaid and self-pay/no charge stays, accounting for approximately 10 and 9 percent, respectively, of aggregate readmission costs.