HCFA Case-Mix Index File
Study Number	A04_98
Background of Dataset
Purpose of the Data Set	This file contains the Medicare case-mix index by provider number as published in each year's update of the Medicare Hospital Prospective Payment System (PPS).
Criteria(s) for Inclusion/Exclusion	The case-mix index is a measure of the costliness of cases treated by a hospital compared to the cost of the national average of all Medicare hospital cases.
Age Range Included	N/A
Method(s) of Data Gathering	Diagnosis-Related Group (DRG) weights were used as a measure of the relative costliness of cases.
Sampling Frame/Design	N/A
Limitation(s) of Study	No
Year(s) Available	1998
Number of Observations	4978
Unit of Observation	Hospital
Publisher	Health Care Financing Administration
Contact Information/Web Address	http://www.hcfa.gov/stats/pufiles.htm
Condition of Use	Publicly Available
Contents of Database
Key Linking Variables
•Patient identifier
•Physician identifier
•Health facility identifier	By hospital provider number
•Geographic identifier
•Other identifier
Demographics Information	N/A
Access/Utilization Information	N/A
Health Care Facility Information	By provider number
•Location
•Number of beds
•Number of MDs
•Other information	Case Mix Index (CMI) and Average Hourly Wage (AHW)
Physician Information	N/A
Cost/Expenditure Information	N/A
Other Information