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CMS Care Compare — DialysisCMS Care Compare — Dialysis Facility
U.S. Centers for Medicare and Medicaid Services · Tier-2 · profile-enrichment (renders on matched profiles)
Agency-level identity + 5-star quality rating + ownership + chain affiliation + service offerings (in-center hemodialysis, peritoneal dialysis, home hemodialysis training) for ~7,557 Medicare-certified ESRD facilities. Underlying signal includes ESRD QIP measures and ICH CAHPS.
How this source shows up on Fonteum.
Identity backbone for ESRD facilities (POS QIES doesn't cover dialysis). Drives the brand-hub `/care-compare/dialysis` module. Chain-ownership concentration (~90% chain-owned) is relevant journalism material.
What this source does NOT mean
Star rating reflects the CMS-published 5-star dialysis rating; Fonteum does not independently rate, score, or rank facilities. Suppression for <11 patients in the measure period applies.
Research and data questions this source supports.
- Build a dialysis facility quality leaderboard by state using CMS five-star ratings — covering 90% of the market dominated by chain ownership (DaVita, Fresenius).
- Surface the nearest five-star dialysis centers for a patient geography tool, using CMS geocoordinates.
- Identify dialysis facilities under large chain ownership to support a market concentration research study.
- Cross-reference dialysis facility CCNs against OIG LEIE for compliance screening before network contracting.
- Compare dialysis facility quality distributions across CMS regions to support a health equity analysis.
Dataset size: ~7,557 ESRD facilities (May 2026 snapshot)
Per-field display contract.
Every field below has a `display_allowed` flag in the §94 provenance schema. Write-locked fields are captured to provenance for audit but never rendered on profile pages.
Renders on profile
18 fieldsWhat we can’t infer from this source.
- Suppression for <11 patients in measure period — render `<DataAvailabilityState>` with explicit reason rather than implying low quality.
- ICH CAHPS (patient-experience scores) live in a separate twice-annual dataset; deferred to a follow-on wave.
- 5-star rating is CMS-published; Fonteum does not independently score.
- Chain ownership is unusually concentrated (~90%); flag explicitly as journalism material.
- Non-state jurisdictions present (PR, GU, VI, MP, AS).
Authority, license, refresh cadence.
Authority
U.S. Centers for Medicare and Medicaid Services
Tier
Tier-2 · profile-enrichment (renders on matched profiles)
Refresh cadence
Quarterly (facility 5-star rating); ICH CAHPS twice-annually in the companion dataset (deferred to a follow-on wave).
License
U.S. government public-domain works (17 U.S.C. § 105). Attribution required: 'Source: CMS Care Compare · Dialysis Facility (23ew-n7w9) · Snapshot {YYYY-MM-DD}'. License ↗
Attribution requirement
Source: CMS Care Compare · Dialysis Facility (23ew-n7w9) · Last checked {YYYY-MM-DD}
What the source allows.
U.S. government public-domain works. PDC publishes the dataset at data.cms.gov/provider-data/dataset/23ew-n7w9 with explicit redistribution rights.
What a single field looks like in the graph.
A worked example. Every field surfaced from this source carries this shape of provenance line — source · last checked · display rule · confidence (when applicable).
Field
5-star rating distribution (snapshot 2026-05-07)
Sample value
7,557 facilities; 7,072 rated; mean 2.87 stars; 90.2% chain-owned
Provenance line
Source: CMS Care Compare · Dialysis Facility (23ew-n7w9) · Snapshot 2026-05-07 · Display rule: per-facility 5-star renders on /care-compare/dialysis module + per-facility pages
Official API, bulk download, and Fonteum endpoints.
Official API / download
https://data.cms.gov/provider-data/api/1/datastore/query/23ew-n7w9/0 ↗
Fonteum surface
Common questions about CMS Care Compare — Dialysis.
- What data does the CMS Care Compare Dialysis dataset cover?
- The CMS Care Compare Dialysis dataset contains identity, ownership, and five-star quality measure data for approximately 7,557 Medicare-certified ESRD (End Stage Renal Disease) dialysis facilities. Fields include CCN, facility name, address, ownership chain, star rating, and the individual clinical measures underlying the composite rating (mortality, hospitalization, standardized readmission ratio, Kt/V adequacy, and others).
- How concentrated is dialysis facility ownership in the United States?
- The CMS Care Compare Dialysis snapshot shows approximately 90% chain-ownership concentration by facility count. DaVita and Fresenius Medical Care are the two largest chains, together accounting for the majority of dialysis facilities. The chain_name field in the dataset identifies the ownership entity for each facility.
- Where can I download the CMS dialysis facility data?
- CMS publishes the dialysis facility dataset at data.cms.gov using the dataset ID 23ew-n7w9. It is updated quarterly and is U.S. government public-domain data. The Fonteum dialysis module at fonteum.com/care-compare/dialysis surfaces the full dataset with provenance.
- What is the CMS five-star dialysis quality rating?
- CMS assigns a 1–5 star rating to dialysis facilities based on a composite of clinical quality measures including standardized mortality ratio, standardized hospitalization ratio, standardized readmission ratio, percentage of patients with Kt/V ≥ 1.2, and others. The star cutoffs are set relative to national performance distribution, so a 5-star facility outperforms the national average on all or most measures.
- Does NPI appear in the CMS dialysis dataset?
- Yes — the CMS Care Compare Dialysis dataset is the only Care Compare file set with 100% NPI presence, making it the only Care Compare source that allows a deterministic CCN-to-NPI bridge without a fuzzy NPPES join. Fonteum uses this NPI field to link dialysis facilities directly into the NPI identity graph.
Where this source already shows up.
Research studies citing this source
Related sources in the graph
Per-source methodology: /methodology/care-compare-dialysis →
- /sources → The full source library — every dataset Fonteum cites.
- /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.
- /editorial-policy → Independence, sourcing, conflicts, corrections, retractions.