Search the graph
Type a name or a federal identifier — NPI, CCN, ASC supplier number, PECOS enrollment ID, or PAC ID. Press ⌘K anywhere on the site for the same search.
Ask Fonteum
Ask a structured question over the graph and get an answer with the upstream federal citations available for the returned rows. Coverage today: ownership / operating relationships, OIG sanction records, and CMS Open Payments. Include a federal identifier in the question.
What an entity card shows
Each card is one canonical entity in the resolved graph: its available cross-source identifiers and their link method, ownership and chain edges, current assertions with source metadata where present, and retained claim versions when this entity actually has them. Arbitrary-date reconstruction is not guaranteed.
- Machine surface: /api/v1/entity/resolve and per-entity JSON at /api/v1/entity/{entity_id}.
- History API: /api/v1/history/{subject_type}/{subject_id} with ?at= and /diff — the same reads that power the cards.
- Graph methodology: proof & reconciliation.
- Pin entities and save queries to your watchlist (kept locally in this browser).