Hospital Service Area File, 1995
Study Number	G16_95
Background of Dataset
Purpose of the Data Set	The file can be used to define hospital service areas for Medicare admissions. The file contains the total number of inpatient days and total charges incurred by Medicare beneficiaries in each zip code in the U.S.A., listed by hospital.
Criteria(s) for Inclusion/Exclusion	Based on Medicare admissions.
Age Range Included	Medicare enrollees.
Method(s) of Data Gathering	Derived from hospital claims.
Sampling Frame/Design
Limitation(s) of Study
Year(s) Available	1995.
Number of Observations	854,752.
Unit of Observation	Hospital/zip code dyad.
Publisher(s)	Health Care Financing Administration.
Contact Information/Web Address	http://www.hcfa.gov/stats/PublicUseFiles
Condition of Use	Public Use.
Contents of Database
Key Linking Variables
•Patient identifier
•Physician identifier
•Health facility identifier	Medicare provider number.
•Geographic identifier	Zip code.
•Other identifier
Demographics Information	N/A
Access/Utilization Information
Unit of Utilization
Source of Information
•Self reported
•Parent
•Medical provider
•Billing/encounters	Medicare billing.
•Other source
Health Insurance Information
•Insurance status
•Insurance type
•Other information
Health Care Utilization
>Type
1) Outpatient	N/A
2) Inpatient
•Admission/discharge dates
•Number of admissions	Yes.
•Length of stay
•Admission status (transfer, ER      admissions...etc)
•Discharge status
•Other information	Number of inpatient days.
3) Emergency room	N/A
4) Pharmacy	N/A
5) Other utilization	N/A
>Medical Codes	N/A
Health Care Facility Information	N/A
Physician Information	N/A
Cost/Expenditure Information	N/A
Other Information
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