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NUCC TaxonomyNUCC Health Care Provider Taxonomy
National Uniform Claim Committee (NUCC) · Tier-1 · research-only (never on individual profiles)
The Health Care Provider Taxonomy code set is the official classification of provider type, classification, and area of specialization, maintained by the National Uniform Claim Committee. It is the same reference set NPPES uses to tag provider taxonomy on every NPI and that appears on the X12 837 claim. One row per taxonomy code; the hierarchy is grouping → classification → specialization.
How this source shows up on Fonteum.
Tier-1 reference code set for resolving a taxonomy code to its grouping, classification, specialization, and display name — used to label NPPES-sourced taxonomy across research and data surfaces, and queryable per code. There is no NPI or entity linkage; this is a code set, not a provider record.
What this source does NOT mean
A taxonomy code classifies a provider type — it is not a credential, a license, a quality measurement, or a statement that any specific provider holds that classification. The code set is reference data, not a Fonteum assessment of any provider.
Research and data questions this source supports.
- Resolve a NUCC taxonomy code (e.g. 207RA0201X) to its grouping, classification, specialization, and display name.
- Label NPPES-sourced provider taxonomy codes with human-readable specialty names across research and data surfaces.
- Build a specialty filter for a provider directory using the grouping → classification → specialization hierarchy.
- Power a reference API that returns the full taxonomy record for a code.
Dataset size: 883 taxonomy codes (2026-06-14 snapshot)
Per-field display contract.
Fields listed below show their configured `display_allowed` flag from the §94 provenance schema. Fields marked write-locked are captured for audit and are not rendered on profile pages.
Research-only — never on profiles
6 fieldsWhat we can’t infer from this source.
- Reference code set — there is no NPI, no provider record, and no entity-graph linkage.
- Tier-1 — reference/research context only; never rendered as a provider claim on individual profiles.
- NUCC revises the code set twice a year; codes can be added, deprecated, or redefined between versions.
- A taxonomy code is a classification, not a credential or license.
Authority, license, publisher cadence.
Authority
National Uniform Claim Committee (NUCC)
Tier
Tier-1 · research-only (never on individual profiles)
Publisher / configured cadence
Declared or configured cadence: Semiannual — NUCC publishes version YY.0 (effective July 1) and YY.1 (effective January 1) each year. Not evidence of the latest loaded source date.
License
Public NUCC Health Care Provider Taxonomy code set — published free for public use by the National Uniform Claim Committee, no reuse restriction.
Official URL
Attribution requirement
Source: National Uniform Claim Committee (NUCC) — Health Care Provider Taxonomy · Version {VV.V}
What the source allows.
The NUCC Health Care Provider Taxonomy is published free for public use on nucc.org as a version-stamped CSV; there is no reuse restriction beyond attribution to the National Uniform Claim Committee. Snapshot and attestation fields must be read from the specific artifact; no provenance fact currently links deterministically to a signature.
What a single field looks like in the graph.
This worked example shows the provenance shape used when a surfaced field has populated source, last-checked, display-rule, and confidence metadata. Individual fields may omit unavailable values.
Field
Taxonomy code (reference)
Sample value
207RA0201X · Allopathic & Osteopathic Physicians · Internal Medicine · Allergy & Immunology
Provenance line
Source: NUCC Health Care Provider Taxonomy · Snapshot 2026-06-14 · Methodology nucc-taxonomy/v1 · Display rule: reference code set — resolves a taxonomy code to its labels, never an asserted provider claim
Official API, bulk download, and Fonteum endpoints.
Official API / download
Fonteum surface
Common questions about NUCC Taxonomy.
- What is the NUCC Health Care Provider Taxonomy?
- It is the official code set that classifies a provider's type, classification, and area of specialization, maintained by the National Uniform Claim Committee (NUCC). It is the same reference set NPPES uses to tag provider taxonomy on every NPI and that appears on the X12 837 claim. There is one row per taxonomy code.
- How is the taxonomy structured?
- Each code maps to a three-level hierarchy: grouping (e.g. Allopathic & Osteopathic Physicians), classification (e.g. Internal Medicine), and specialization (e.g. Allergy & Immunology), plus a human display name and a section (Individual or Non-Individual).
- Is this linked to individual providers?
- No. This is a reference code set — there is no NPI, no provider record, and no entity-graph linkage. It resolves a code to its labels; it does not assert that any specific provider holds that classification.
- How often is the code set updated?
- NUCC publishes two versions a year — YY.0 effective July 1 and YY.1 effective January 1. Fonteum resolves the current version-stamped CSV newest-first and attests each snapshot. As of the 2026-06-14 snapshot, Fonteum holds 883 taxonomy codes.
- Is a taxonomy code a credential?
- No. A taxonomy code is a classification, not a credential or license. Holding a code in NPPES is self-reported by the provider and does not assert board certification or licensure — confirm credentials with the relevant state board.
Where this source already shows up.
Related sources in the graph
- /sources → The generated source-catalog subset — documented datasets Fonteum cites.
- /data-provenance → The provider graph — pipeline diagram, source-family clusters, field-level provenance examples, display rules.
- /methodology → Documented sourcing, publisher cadence, observed freshness, and corrections policy.
- /editorial-policy → Independence, sourcing, conflicts, corrections, retractions.