We don’t sell ranking and don’t accept payment to move a provider up the list. For final hire decisions, verify licensing, insurance, and references directly with the applicable licensing or credentialing body.
No bulk-licensing source family is currently ingested for this vertical. Hire-time checking still routes through the body named above.
State-level rollups of CMS Care Compare dialysis-facility ratings.
v2026.05.0Last refreshed April 1, 2026Cadence Quarterly (matches CMS Care Compare release cadence).This page is the public, versioned methodology for the Dialysis Facility Quality by State (CMS Care Compare) dataset. It documents how every figure on the matched Fonteum Research study, /api/v1 endpoint, and Audit Pack was constructed — from registered public-source ingest through aggregation rules to the rendered output. It exists so buyers can satisfy auditor questions by linking to a single durable URL.
Every section below is the source of truth. Where the methodology differs from the underlying source's own description (for example: which taxonomies count, how Type-1 vs Type-2 NPIs are treated, how density per 100k is computed), the rule lives here, not in the source. Methodology versions (v2026.05.0 today) increment when those rules change; data refreshes within a methodology version are tracked separately under refresh historyand surface as the “Last refreshed” banner above.
The Fonteum sources registry holds the canonical entry for each source family — Tier classification, ToS posture, refresh schedule, and live-vs-pending status: /sources.
An independent researcher with access only to the public sources listed above can recreate this dataset by following these steps. Discrepancies between an independent reproduction and the published figures belong in /corrections-log; we publish them when they arise.
Limitations are surfaced explicitly, not buried. Each item below is a constraint a buyer’s compliance team should review before relying on the dataset for a specific use case.
Every field surfaced from this dataset on the API and rendered surfaces. Source, refresh cadence, and confidence are recorded per field, not per dataset.
| Field | Description | Source | Refresh | Confidence |
|---|---|---|---|---|
facility_ccn | CMS Certification Number for the dialysis facility. | CMS Care Compare — Dialysis Compare ↗ | Quarterly | 1.0 (verbatim) |
state | Facility state (USPS code). | CMS Care Compare — Dialysis Compare ↗ | Quarterly | 1.0 (verbatim) |
rating | CMS dialysis-facility rating where published. | CMS Care Compare — Dialysis Compare ↗ | Quarterly | 1.0 (verbatim) |
Every methodology version bump is recorded here with the change rationale. Data-only refreshes (no methodology change) appear as same-version entries with a refresh date.
| Version | Released | What changed |
|---|---|---|
v2026.05.0current | May 6, 2026 | Initial Audit Pack release. Methodology, provenance map, reproducibility statement, and limitations stack baselined. |
For procurement attachments, audit responses, footer attribution, or academic use. Pick a format and copy.
Methodology questions: methodology@fonteum.com. Data corrections: /corrections-log. B2B inquiries: api@fonteum.com.
This page is the durable URL a buyer’s compliance officer can link from their product. The version pinned at the URL (v2026.05.0) is the active methodology; historical versions remain accessible at the same URL with prior-version content available in the Version history table.