Postacute care under Medicare may be provided in several institutional settings, some of which function as substitutes for each other, including rehabilitation care in either specialty hospitals and hospital units excluded from Medicare PPS or skilled nursing facility care. This study uses Medicare billing data to examine institution-based postacute care utilization for beneficiaries' hospital episodes occurring from February 1, 1992 through June 30, 1992. Data on inpatient and postacute Part A services used by Medicare inpatients receiving care in rehabilitation facilities or skilled nursing facilities are presented. The results indicate that, even after casemix is controlled for, inpatient stay treatment variables affect postacute care utilization patterns. Nonclinical factors such as age and sex also affect choice of postacute care site.
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