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NPI reference

One canonical record per National Provider Identifier

Every /npi/<npi> page resolves a single 10-digit NPI across the federal source graph and renders it server-side with field-level provenance — the source name and snapshot date behind every claim. Stable, permanent URLs built for citation by people, search engines, and AI agents. Each record is also available as JSON at /api/v1/npi/<npi>.

Don't have an NPI to hand? Look one up by name or specialty, or browse the provider directory.

What each record draws on

  • CMS NPPESRegistry identity, specialty taxonomy, practice location.
  • CMS PECOSMedicare enrollment record.
  • CMS Open PaymentsIndustry payments and transfers of value (Sunshine Act).
  • CMS Medicare Part DPrescribing volume and drug cost across the program.
  • CMS QPP / MIPSMerit-based Incentive Payment System quality score.
  • OIG LEIE + state MedicaidFederal and state exclusion status (NY, OH, GA).

All sources are U.S. government public-domain works (17 U.S.C. § 105). Exclusion data is a screening aid, not a legal or credentialing certification. Reviewed by Dr. Jennifer Montecillo, MD · corrections to hello@fonteum.com. See the methodology.

The substrate, by the numbers

44federal source familiesDistinct CMS, OIG, HRSA, FDA and peer datasets
33dataset pagesCitable, downloadable /data catalog pages
47reproducible studiesEach shipping the SQL behind its figures

Built on the authoritative federal record

The primary sources, named on every page.

These are the federal agencies whose public datasets Fonteum ingests and attributes — the issuing authorities, not customers or partners. Every figure on the site links back to one of them.

  • CMS
  • HHS-OIG
  • HRSA
  • FDA
  • NLM
  • NUCC
  • Census
  • BLS
  • BEA

See the full source registry, with license and refresh cadence for each →

Reproducible by design

Every figure traces to its federal source.

14-tuple provenance

Every rendered fact ties to a source URL, dataset ID, snapshot date, row key, and SHA-256 — the full chain-of-custody record.

Reproducible SQL

Each study ships the exact query behind its figures, run against the cited federal snapshot. Re-run it yourself.

Daily reconciliation

Published counts are reconciled against the upstream federal datasets on a daily cadence, with drift logged.

Named medical review

Reviewed by Jennifer Montecillo, MD, medical reviewer. Non-practicing medical reviewer.

Read the full provenance and attestation methodology →

Two doors

Use the free API and open data

Query providers, facilities, sanctions, and quality scores — each field carrying its federal source. Self-serve, no call to start.

Explore the API →Browse the data catalog →

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Reviewed by Jennifer Montecillo, MD, medical reviewer. Non-practicing medical reviewer.

© 2026 Fonteum LLC. All rights reserved.

The U.S. healthcare graph AI can cite — every fact carries its source.

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