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Provider directory

Provider records from named federal sources.

Search records enumerated in NPPES by NPI, specialty, or state. Displayed fields show their available source, observation date, methodology, and limitations. No pay-to-rank.

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Activeproduction source registryRegistry status is not completeness, load status, or freshness.
35dataset pagesLive at /data with schema + download.
Look up a provider

Find a provider by NPI.

Enter a 10-digit National Provider Identifier to see available CMS NPPES enrollment data, MIPS quality scores, and OIG exclusion status. Source and observation fields are shown when returned and can be null or absent.

NPI lookup tool →
Browse the directory

Browse providers by specialty or state.

Top specialties
Top states
Data infrastructure

How the provider graph is built.

  • /data → Dataset catalog with schema and downloads.
  • /sources → The source registry: tier, refresh cadence, limitations.
  • /methodology → Network-wide sourcing and corrections policy.
  • /chain → Snapshot integrity and witness co-signatures.

Snapshot: 2026-06-10 · Source: CMS NPPES weekly full-replacement file · source registry

What’s on file, by the numbers

Platform snapshot · 2026-08-29

13.4Mproviders & companiesProviders, organizations, owners, and facilities on file
26.2Msource-linked factsSource-linked field facts in the dated platform snapshot
90sources with dataDistinct snapshot source IDs with at least one positive record count
19fresh sourcesDistinct source IDs whose latest positive-data snapshot falls within the preceding 45 days
111sources integratedActive registry rows; integration does not establish a load
13state Medicaid jurisdictionsDistinct states represented in the state-exclusions serving table

Integrated, with-data, and fresh-observation counts are separate. No platform-wide source-completeness count is published. Completeness is source-specific and must be evaluated against the named source's expected scope. State coverage is a separate jurisdiction measure.

Source authority is record-specific

Use the issuer named on the record.

Fonteum spans federal, state, and global public publishers. A source page or returned record identifies its issuer and dataset where that metadata is available. A platform registry count does not assign every page to one authority or establish loaded, fresh, or complete coverage.

Browse source records and their stated limitations →

Reproducible by design

Inspect the evidence each published figure actually supplies.

Source and date

Research pages expose the named public file and observation date where those fields are available. Source-file SHA-256 coverage is separate; facts do not currently link deterministically to signatures.

Available derivation

Studies with a retained release and committed derivation link the SQL or method used. Other studies state the evidence and reproduction limits they actually have.

Daily observations

Dated table row-count observations can detect local drift. They do not imply that an upstream publisher released or Fonteum ingested new data that day.

Named medical review

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

Read the full provenance and attestation methodology →

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