Use the data

A historical archive for researchers and developers. Download recorded summaries, locate archived sources, and inspect collection limitations.

Downloads

Hospital catalog (JSON) — current coverage and links for every hospital
Hospital catalog (CSV) — the same inventory as a flat table
Quality report (JSON) — recorded problems and summary checks
Collection health (JSON) — check outcomes, evidence, schedules, and gaps
Historical source audit (JSON) — repaired links, verification evidence, and remaining gaps
Schema and interpretation guide
Python example: download and verify a historical summary
Data roadmap

Coverage at this build

Hospitals tracked	107
With a current summary	107
With an archived source link for the latest snapshot	107
Recorded archive states	427
Historical states without an archived source link	0
Historical states with source limitations	1
Hospitals with recorded issues	2

Archived-source coverage means a matching link is recorded; this build does not download and verify every original. Historical gaps count recorded states, including summary rebuilds and temporary metadata resets; they do not necessarily represent distinct missing files. The catalog lists the gaps per hospital, and manifests identify each affected snapshot.

The historical audit reviewed 38 states and restored source links for 38. Read the findings and remaining limitations.

Collection freshness

107 hospitals have a recorded successful source check; 0 have no successful check recorded yet. 0 are overdue for a scheduled attempt and 0 are overdue for source verification.

These counts are evaluated at build time. Daily monitoring also checks the recorded schedules. The catalog distinguishes full downloads, header checks, sampled fingerprints, failures, and deliberately deferred downloads. “Last changed” describes a snapshot, not its freshness. Checks before logging began remain unknown; header and sample matches do not verify every byte.

Recorded issues

Hospital	Issue
The Queen's Medical Center	The latest observed check failed or could not find the source listing. The most recently recorded download failure is unresolved.
Yale New Haven Hospital	The latest observed check failed or could not find the source listing. The most recently recorded download failure is unresolved.

Working with snapshots

Find a hospital in the catalog and open its snapshots_url.
Select a snapshot with a summary_url. Save its snapshot_id, method version, and warnings alongside your analysis.
Download the summary from its pinned Git revision. The example script verifies its Git object ID before saving.

Snapshot dates record observations, not price effective dates. Summary rows group codes and descriptions; they do not retain separate payer, plan, setting, modifier, or unit dimensions. Consult original files for that context. Do not treat a method change, a renamed entry, or a missing price as a price change.

Catalog schema 1; built from f40c38a056cd. Generated 2026-10-24T11:21:57+00:00.