Tools for More Accurate Inpatient Cost Estimates with HCUP ...

We defined 746 MS-DRG categories and 262 CCS categories. We calculated relative cost andAFs for 449 distinct MS-DRG categories and 227 distinct CCS categories. For the remaining297 MS-DRG and 35 CCS categories, we could only calculate a group AF.The resulting AFs ranged between 0.815 and 1.383 for MS-DRGs (0.864 and 1.396 for CCScategories). However, 87.5% of distinct AFs for MS-DRGs were between 0.90 and 1.10; 82.8%of distinct AFs were within this range for CCS categories. Both of the grouped AFs for the MS-DRG and CCS categories were in the range of 0.90 and 1.10. If we included the groupedcategories, 92.5% of AFs for MS-DRGs and 85.1% of AFs for CCS categories were between0.90 and 1.10, respectively.Highest AFs (CCS categories)The following 10 categories had the highest AFs among CCS categories:• Delirium, dementia, and amnesia; other cognitive disorders• Umbilical cord complication• Obstetric-related trauma to perineum and vulva• Forceps delivery• Mood disorders• Normal pregnancy and/or delivery• Adjustment disorders• Schizophrenia and other psychotic disorders• Hemolytic jaundice and perinatal jaundice• Attention-deficit, conduct, and disruptive behavior disorders.Lowest AFs (CCS categories)The following 10 categories had the lowest AFs among CCS categories:• Nonspecific chest pain• Transient cerebral ischemia• Abdominal pain• Coagulation and hemorrhagic disorders• Conditions associated with dizziness or vertigo8