Every public-record source that powers OwnListed.

• Tier-2 · profile-enrichmentLive

  CMS NPPES NPI Registry

  Source:CMS NPPES·Checked May 2026

  We match dermatology and chiropractic practice listings to NPPES records and surface the NPI, taxonomy code, taxonomy description, and NPI enumeration date on the profile. Each value carries source attribution + last-checked date + the §95 limitations sentence.

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• Tier-2 · profile-enrichmentLive

  CMS PECOS Medicare Provider Enrollment

  Source:CMS PECOS·Checked May 2026

  We cross-reference NPPES-matched healthcare practices against PECOS to surface a Medicare-billing-active indicator on the profile, alongside the CMS provider type and enrollment state. The display module is gated to medical archetypes only.

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• Tier-2 · profile-enrichmentResearch-only

  CMS Care Compare

  Source:CMS Care Compare·Checked May 2026

  Today: four published research snapshots — nursing homes, home health, dialysis, hospice — plus the source pack staged for future Tier-2 facility pilots. CMS overall star ratings and component sub-ratings render only when a facility-level vertical launches; until then the data is research-only.

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• Tier-2 · profile-enrichmentLive

  Florida DBPR Construction Industry Licensing Board

  Source:FL DBPR·Checked May 2026

  We match HVAC, roofer, plumber, general-contractor, and pool-builder profiles in Florida against the CILB master file (CONSTRUCTIONLICENSE_1.csv) and surface the license number, classification, status, issue date, and expiration on the profile. Bond / workers-comp / insurance / discipline fields stay write-locked pending operator copy review.

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• Pending · manual records requestPending records request

  Arizona Registrar of Contractors

  Source:AZ ROC·Checked May 2026

  Manifest registered + ingestion pilot ready. Pending operator-supplied CSV. Once written, AZ HVAC / solar / roofer profiles will surface the license number + classification + status with the same display contract as Florida.

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• Pending · manual records requestPending records request

  California Contractors State License Board

  Source:CSLB (CA)·Checked May 2026

  Manifest registered + ingestion pilot ready. Pending operator-supplied CPRA-response CSV. Once written, CA HVAC / electrician / solar / roofer / GC profiles will surface license number + classification + status.

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• Tier-1 · research-onlyResearch-only

  HRSA Health Professional Shortage Areas (HPSA)

  Source:HRSA HPSA·Snapshot May 2026

  Tier-1 research-only context for /research pages discussing healthcare access. HRSA HPSA designations cover Primary Care + Dental + Mental Health only; they do NOT cover dermatology, chiropractic, or specialty care.

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• Tier-1 · research-onlyResearch-only

  BLS Occupational Employment & Wage Statistics (OEWS)

  Source:BLS OEWS·Snapshot May 2026

  Tier-1 research-only context for /research pages that discuss workforce supply, wage benchmarks, or per-capita density. OEWS data appears in study commentary and methodology footnotes — it does NOT attach to individual provider profiles.

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• Tier-1 · research-onlyResearch-only

  BEA Regional Economic Accounts

  Source:BEA Regional·Snapshot May 2026

  Tier-1 research-only context for /research pages that discuss regional spending, healthcare-services GDP, or per-capita income. BEA data appears in study commentary — it does NOT attach to individual provider profiles.

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• Tier-1 · research-onlyResearch-only

  U.S. Census Bureau — State Population Estimates (2024 vintage)

  Source:US Census·Snapshot May 2026

  Per-capita denominators in research studies (e.g. 'X dermatologists per 100,000 residents'). Tier-1 — appears in study tables and methodology, never on individual provider profiles.

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• First-party · OwnListed ResearchLive

  OwnListed Research Snapshots

  Source:OwnListed Research·Checked May 2026

  Hosting OwnListed's own research deliverables: state-level CMS Care Compare snapshots, vertical supply / coverage studies (HVAC, solar, fence, dermatology), and provider-supply benchmarks. Renders on /research and /press; never overwrites federal source attribution on a per-field basis.

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Restricted, paid, or no-go data sources.

Sources we considered and explicitly do not use, with the honest reason. Restricted-distribution data, paid licensing products, and unverifiable backfills do not enter the graph; their absence is a doctrine choice, not an oversight.

• NMLS Consumer AccessNot used

  Nationwide Multistate Licensing System (Conference of State Bank Supervisors)

  Mortgage / financial-services licensing portal. Per its terms, NMLS data is not available for bulk redistribution and the consumer-access portal is read-only. OwnListed does not display individual MLO records sourced from NMLS; mortgage-vertical profiles render only the operator-supplied data.

• State Bar associationsNot used

  Per-state bar associations (CA, FL, TX, NY, IL, etc.)

  Per-state attorney licensing data is restricted across most states (terms vary; many forbid redistribution or commercial display). OwnListed legal verticals do not render bar-membership status as a sourced field; users are routed to the relevant state bar's own lookup tool.

• ABMS / CertiFacts (board certification)Not used

  American Board of Medical Specialties / CertiFacts

  Board-certification verification is a paid licensed product with restrictive redistribution terms. OwnListed does not display ABMS board-certification status as a sourced field. The §95 NPPES limitations sentence directs users to the relevant state medical board or the ABMS / AOA registries to confirm credentials directly.

• Google Places / Google Business Profile (backfill)Not used

  Google

  We do not use Google Places / GBP as a data backfill for provider directories. Where a study's universe needs to be expanded, we expand from federal/state public records (CMS NPPES, CMS Care Compare, state contractor boards). Padding the index with Places listings would import unverifiable claims and break the source-cited contract.

• /data-provenance → The provider graph — pipeline diagram, source-family clusters, field-level provenance examples, display rules.
• /methodology → Network-wide sourcing, refresh cadence, and corrections policy.
• /research → Tier-1 dated aggregates published from the source graph.
• /editorial-policy → Independence, sourcing, conflicts, corrections, retractions.