Impact of the transition to ICD-10 on Medicare inpatient hospital payments.

Objective: On October 1, 2013, the reporting of diagnoses and procedures in the U.S. will transition from the clinical modification of the ninth revision of the International Classification of Diseases (ICD-9-CM) to the tenth revision (ICD-10).

Estimating the costs of potentially preventable hospital acquired complications.

California and Maryland hospital data are used to estimate the incremental cost associated with 64 categories of hospital acquired complications. The reason for admission, severity of illness at admission and the presence of hospital acquired complications are used in a linear regression model to predict incremental per patient cost yielding an adjusted R2 of 0.58 for Maryland data and 0.