Compliance-grade provenance, not data marketing.

Audit Pack is the export-tier deliverable within Fonteum.Most data vendors say "we're accurate" and offer an NDA. Fonteum is the opposite: a per-dataset, per-field, versioned compliance artifact a buyer can attach to their internal audit response. Methodology is public. Reproducibility is documented. Limitations are explicit. PDF + JSON downloads are free.

What every Audit Pack contains

• Versioned methodology. Semver-like (vYYYY.MM.N). Diff per version, when next is expected.
• Per-field provenance map. Source, source URL, refresh cadence, confidence score, field-specific limitations.
• Reproducibility statement. Exact public-source steps to regenerate the dataset from scratch — buyers can rerun and reconcile.
• Limitations stack. CMS / NPPES / Census published caveats preserved verbatim. We don't silently strip caveats.
• Compliance Q&A. 5-7 of the most common audit / procurement questions, pre-answered with source links.
• Downloadable artifacts. PDF (versioned, timestamped) + JSON (structured for compliance-tool ingestion).
• Customer-scoped option. Pilot / Standard / Enterprise customers receive Audit Packs scoped to their delivery cadence and contracted dataset list.

Fonteum API · Audit Pack export endpoint

Per-CCN audit-pack export. The buyer-pilot deliverable referenced in our healthtech outreach: send us a 6–10 character CCN, we return all fields from 13 ingested Sprint 1 sources joined, provenance-tagged, snapshot-dated, methodology-versioned. NDJSON streaming by default (one chunk per line); JSON envelope and CSV alternatives available.

Endpoint

GET /api/v1/audit-pack/export
  ?ccn=015009
  &format=ndjson         # ndjson (default) | json | csv
  &include_delta=true    # optional: prepend field_change_log entries
  &fields=ccn,total_nurse_hours_per_resident_day,sff_status
  &sources=cms-pbj,cms-sff,cms-snf-all-owners

Authorization: Bearer ownl_...

Sample NDJSON response (first 3 lines)

{"schema_type":"fonteum-audit-pack-export","schema_version":"1.0","ccn":"015009","format":"ndjson",
  "pos_qa":{"passed":true,"pos_snapshot_date":"2026-05-07"},
  "source_inventory":[{"source_id":"cms-pos","snapshot_date":"2026-05-07","available":true},...],
  "methodology_url":"https://fonteum.com/methodology",...}
{"line_type":"audit_pack_record","ccn":"015009","facility_type":"skilled-nursing-facility",
  "facility_name":"BURNS NURSING HOME, INC.","state":"AL","pos_qa_status":"ok",
  "identity":{"source_id":"cms-pos","fields":{"facility_name":{"value":"BURNS NURSING HOME, INC.",
    "source":"CMS Provider of Services (QIES)","source_url":"https://data.cms.gov/...",
    "dataset_id":"cms-pos","snapshot_date":"2026-05-07","methodology_version":"v2026.05.0",
    "last_checked":"2026-05-08T...","confidence_score":1.0,"data_availability":"available"},...}},
  "sources":{"cms-pbj":{...},"cms-sff":{...},"cms-snf-all-owners":{...},...}}

Field inventory per source (13 sources)

• cms-care-compare-hh (18 fields): CMS Care Compare — Home Health Care Agencies · methodology
• cms-care-compare-hospice (14 fields): CMS Care Compare — Hospice General Information · methodology
• cms-care-compare-dialysis (19 fields): CMS Care Compare — Dialysis Facility · methodology
• cms-care-compare-asc (17 fields): CMS Care Compare — ASC Quality Measures (Facility) · methodology
• cms-care-compare-hospitals (11 fields) — data-only: CMS Care Compare — Hospital General Information · methodology
• cms-care-compare-ltach (10 fields) — data-only: CMS Care Compare — LTACH General Information · methodology
• cms-care-compare-irf (10 fields) — data-only: CMS Care Compare — IRF General Information · methodology
• cms-pbj (10 fields): CMS Payroll-Based Journal (PBJ) Daily Nurse Staffing · methodology
• cms-snf-all-owners (10 fields): CMS SNF All Owners (PE / REIT / Chain) · methodology
• cms-nh-deficiencies (9 fields): CMS NH Health Deficiencies (per-citation) · methodology
• cms-nh-penalties (6 fields) — data-only: CMS NH Penalties (sub-join of Deficiencies) · methodology
• cms-sff (7 fields): CMS Special Focus Facility (SFF) Program List · methodology
• oig-leie (16 fields): OIG List of Excluded Individuals/Entities (LEIE) · methodology

Provenance contract

Every value is wrapped in a provenance cell: { value, source, source_url, dataset_id, snapshot_date, methodology_version, last_checked, confidence_score, data_availability, data_availability_reason? }. Missing data surfaces explicitly via data_availability values like pending_refresh (Phase-1 derivation), aggregate_only (per-citation rows not materialized), or facility_level_not_ingested (state-rollup only). No fabrication. No interpolation. POS QA failure (CCN missing from POS) → 404 with the POS snapshot date.

Methodology versioning + delta log

methodology_version is pinned per cell to v2026.05.0 for the Sprint 1 export. Pass ?include_delta=true to receive field_change_log entries from the Sprint 1 foundation Postgres migration; entries surface (ccn, field_name, old_value, new_value, snapshot_date_old, snapshot_date_new) tuples once consecutive snapshots have been diffed. Empty array is the honest answer when no diff has been computed yet.

Request API access → · OpenAPI docs → · Methodology → · Identity graph →

NPPES specialty supply (13)

• v2026.05.0
  Dermatology Provider Supply by State
  Active U.S. dermatologists per 100,000 residents, by state, from the public CMS NPI Registry.
  18,765 dermatologists · Quarterly NPPES refresh; annual Census denominator update.
• v2026.05.0
  Psychiatry Provider Supply by State
  Active U.S. psychiatrists per 100,000 residents, by state.
  62,118 psychiatrists · Quarterly NPPES refresh; annual Census denominator update.
• v2026.05.0
  Cardiology Provider Supply by State
  Active U.S. cardiologists per 100,000 residents, by state.
  35,006 cardiologists · Quarterly NPPES refresh; annual Census denominator update.
• v2026.05.0
  Obstetrics & Gynecology Provider Supply by State
  Active U.S. OB-GYN physicians per 100,000 residents, by state.
  8,572 OB-GYNs · Quarterly NPPES refresh; annual Census denominator update.
• v2026.05.0
  Pediatrics Provider Supply by State
  Active U.S. pediatricians per 100,000 residents, by state.
  33,410 pediatricians · Quarterly NPPES refresh; annual Census denominator update.
• v2026.05.0
  Neurology Provider Supply by State
  Active U.S. neurologists per 100,000 residents, by state.
  24,659 neurologists · Quarterly NPPES refresh; annual Census denominator update.
• v2026.05.0
  Oncology Provider Supply by State
  Active U.S. medical oncologists per 100,000 residents, by state.
  7,286 oncologists · Quarterly NPPES refresh; annual Census denominator update.
• v2026.05.0
  Orthopedic Surgeon Supply by State
  Active U.S. orthopedic surgeons per 100,000 residents, by state.
  30,447 orthopedic surgeons · Quarterly NPPES refresh; annual Census denominator update.
• v2026.05.0
  Ophthalmology Provider Supply by State
  Active U.S. ophthalmologists per 100,000 residents, by state.
  24,811 ophthalmologists · Quarterly NPPES refresh; annual Census denominator update.
• v2026.05.0
  Gastroenterology Provider Supply by State
  Active U.S. gastroenterologists per 100,000 residents, by state.
  21,236 gastroenterologists · Quarterly NPPES refresh; annual Census denominator update.
• v2026.05.0
  Urology Provider Supply by State
  Active U.S. urologists per 100,000 residents, by state.
  14,748 urologists · Quarterly NPPES refresh; annual Census denominator update.
• v2026.05.0
  Otolaryngology (ENT) Provider Supply by State
  Active U.S. otolaryngologists (ENT) per 100,000 residents, by state.
  12,453 otolaryngologists · Quarterly NPPES refresh; annual Census denominator update.
• v2026.05.0
  Chiropractor Provider Supply by State
  Active U.S. chiropractors per 100,000 residents, by state. Backs the §193d-promoted ChiroProList hero vertical.
  97,017 chiropractors · Quarterly NPPES refresh; annual Census denominator update.

CMS Care Compare facility quality (4)

• v2026.05.0
  Nursing-Home Quality by State (CMS Care Compare)
  State-level rollups of CMS Care Compare nursing-home overall quality ratings.
  14,000 facilities · Quarterly (matches CMS Care Compare release cadence).
• v2026.05.0
  Dialysis Facility Quality by State (CMS Care Compare)
  State-level rollups of CMS Care Compare dialysis-facility ratings.
  7,700 facilities · Quarterly (matches CMS Care Compare release cadence).
• v2026.05.0
  Home-Health Quality by State (CMS Care Compare)
  State-level rollups of CMS Care Compare home-health agency ratings.
  11,500 agencies · Quarterly (matches CMS Care Compare release cadence).
• v2026.05.0
  Hospice Provider Availability by State (CMS Care Compare)
  State-level rollups of CMS Care Compare hospice provider counts.
  5,300 providers · Quarterly (matches CMS Care Compare release cadence).

For pilots and contracted customers

Pilot tier (1 Audit Pack per contracted dataset, per quarter), Standard tier (monthly), and Enterprise tier (per-delivery, scope-specific) all include customer-scoped Audit Packs delivered alongside the data. Methodology version is pinned to the snapshot you received; rollback to a prior version is documented in the change history.

Pricing → · Request access → · pilot@fonteum.com