The links below provide additional information on the impact of the ICD-10-CM/PCS transition on readmission rates, readmission methodology, and variance calculations applicable to the Nationwide Readmissions Database (NRD).

• Impact of the ICD-10-CM/PCS Transition on Readmission Rates, 2015-2017 (PDF file, 359 KB)
  • Supplemental Tables (Excel file, 285 KB)
• HCUP Method Series Reports
  • Calculating Nationwide Readmissions Database (NRD) Variances (PDF file, 325 KB)
  • Methodological Issues When Studying Readmissions and Revisits Using Hospital Administrative Data (PDF file, 301 KB)
  • Overview of Key Readmission Measures and Methods (PDF file, 348 KB)