Data Sources

Understanding the data behind HospRates

Primary Data Source

HospRates uses CMS Hospital Price Transparency machine-readable files (MRF) published by hospitals as mandated by federal regulations. These files contain negotiated rates between hospitals and insurance payers for medical procedures and services.

Official Source: Centers for Medicare & Medicaid Services (CMS) Hospital Price Transparency Rule

Learn more at CMS.gov →

Hospitals Included

Currently, HospRates covers 3 hospitals in the Buffalo, NY area:

  • Kenmore Mercy Hospital - 5,115,612 records
  • Mercy Hospital of Buffalo - 6,277,913 records
  • Sisters of Charity Hospital - 6,248,981 records
  • Dataset Link →

Total dataset: 17,921,525 price records across all hospitals

Code Types

HospRates supports three standardized medical billing code types:

  • CPT (Current Procedural Terminology): Codes for medical procedures and services
  • HCPCS (Healthcare Common Procedure Coding System): Codes for equipment, supplies, and non-physician services
  • MS-DRG (Medicare Severity Diagnosis Related Groups): Codes for inpatient hospital stays

Data Limitations

Important Notes:

  • Prices represent negotiated rates, not final patient costs
  • Actual charges depend on insurance coverage, deductibles, and out-of-pocket maximums
  • Data reflects published rates, which may not match real-world billing
  • Not all procedures or payers are included in every hospital's file
  • Data is updated periodically as hospitals publish new files

Payer & Plan Coverage

The dataset includes pricing information from 80 distinct insurance payers and 231 insurance plans, covering commercial insurers, Medicare Advantage, Medicaid managed care, and other payer types.

Data Freshness

Last Updated: January 2026
Hospital price transparency files are typically updated annually or semi-annually. We monitor hospital websites for new file releases and update our dataset accordingly.

Questions?

For questions about our data sources or methodology, contact us at: sohammane01@gmail.com