Hospital Data:

HPS has been providing hospital data for benchmarking analyses since1993 that include strategic pricing services for U.S. hospitals. Our powerful hospital data analyses enable our clients to "hand pick" specific hospitals in a local market for side-by-side pricing comparisons at the HCPCS or DRG level.  HPS also accommodates fast turnaround times and typically completes custom reports of hospital prices electronically within 48 hours. Our hospital data include outpatient data, inpatient data, detailed by inpatient service line pricing, department level pricing, and hospital room rates along, and hospital financial data, derived from Medicare Cost Reports. The hospital data provided by HPS are reliable and accurate.

Source: http://hospitalpricingspecialists.com

MEDPAR:

The Medicare Provider Analysis and Review (MEDPAR) File contains data from claims for services provided to beneficiaries admitted to Medicare certified inpatient hospitals and skilled nursing facilities (SNF). The accumulation of claims from a beneficiary's date of admission to an inpatient hospital, where the beneficiary has been discharged, or to a skilled nursing facility, where the beneficiary may still be a patient, represents one stay. A stay record may represent one claim or multiple claims. Approximately 95% of inpatient stays and 50% of SNF stays involve a single claim. Prior to 1999, Managed Care Organization (MCO) data was included when fully formatted claims were submitted; about 3% of the no pay bills were for MCO claims. Beginning in 1999, MCO bills were excluded. Beneficiary demographic characteristics, diagnosis and surgery information, and use of hospital or SNF resources are included on the MEDPAR records. In addition, the records contain detailed accommodation and departmental charge data, days of care, and entitlement data. The MEDPAR File allows researchers to track inpatient history and patterns/outcomes of care over time. Data of death information is appended up to three years after data of discharge. It is useful for research into chronic disease prevalent in the elderly populations such as cancer, heart disease, and diabetes and for mortality studies. MEDPAR data are available for both fiscal year and calendar year beginning in 1991.  MEDPAR records represent final action claims data in which all adjustments have been resolved. HPS has an approved data use agreement with CMS to analyze the national MEDPAR data file. 

Source: https://www.cms.gov/IdentifiableDataFiles/05_MedicareProviderAnalysisandReviewFile.asp

OPPS:

Outpatient Prospective Payment System. In response to the rapidly growing Medicare expenditures for outpatient services and large co-payments being made by Medicare beneficiaries, Congress mandated that the Centers for Medicare and Medicaid Services (CMS) develop a Hospital Outpatient Prospective Payment System (HOPPS) and reduce beneficiary co-payments. This payment system, implemented August 1, 2000, is used by CMS to reimburse for hospital outpatient services. HPS has an approved data use agreement with CMS to analyze the national OPPS data file.

Source: http://www.acr.org/Hidden/Economics/FeaturedCategories/mps/hopps.aspx