Skip to content
FonteumThe Graph

The capability layer

APIREST + bulk accessMCP serverCallable by AI agentsFHIR R4 APIBulk exportAttestation & audit packReconciliationSource-vs-source diffsEntity graphSnapshotsPoint-in-time, bitemporal

By use case

Exclusion & sanctions screeningCredentialing & provider-data enrichmentAudit evidence & defensible programsProvider data for AI / RAGM&A & network diligence

By buyer

Compliance & riskDevelopers & AI teams

The differentiator

Coverage & sourcesThe catalogFreshnessMethodologyCare CompareFacility qualityBrowse all datasets →
Research

The dev on-ramp

DocsAPI referenceMCPQuickstartStatusChangelogSDKs & integrations
Pricing
Sign inTry the FHIR sandbox →Request access →

Platform

APIMCP serverFHIR R4 APIBulk exportAttestation & audit packReconciliationEntity graphSnapshots

Solutions

Exclusion & sanctions screeningCredentialing & provider-data enrichmentAudit evidence & defensible programsProvider data for AI / RAGM&A & network diligenceCompliance & riskDevelopers & AI teams

Data

Coverage & sourcesFreshnessMethodologyCare CompareBrowse all datasets →
Research

Developers

DocsAPI referenceMCPQuickstartStatusChangelogSDKs & integrations
Pricing
Sign inTry the FHIR sandbox →Request access →
Fonteum Care Compare · Massachusetts

Massachusetts dialysis facilities: 85 Medicare-certified, 5-star quality data, chain-ownership transparency.

CMS-published 5-star ratings, profit-vs-nonprofit status, chain affiliation, and service offerings (in-center hemodialysis, peritoneal, home hemodialysis training) for every ESRD facility in Massachusetts.

Cross-check at Medicare.gov →All states →
Snapshot May 7, 2026·85 Medicare-certified dialysis facilities in Massachusetts · 85.9% chain-owned·CMS Care Compare — Dialysis (23ew-n7w9)·Module overview →·Methodology →·Audit Pack →
Source-modified 2026-03-25 · Quality measures suppressed when <11 patients in measure period · ICH CAHPS patient-experience measures are a separate CMS dataset, not included in this snapshot

Editorial note: Massachusetts has dense local journalism + AARP coverage of ESRD care; Fonteum's contribution is the per-facility chain + 5-star data layer, not editorial commentary.

Chain concentration — Massachusetts

Dialysis is the most consolidated category in CMS Care Compare. 85.9% of Massachusetts facilities are chain-owned; here are the largest chains by facility count in this state.

Fresenius Medical Care
38
American Renal Associates
15
DaVita
13
Independent
12

Dialysis facilities — Massachusetts

Showing 25 of 85 Medicare-certified facilities, highest CMS 5-star rating first (77 carry a published rating; the remainder are suppressed for low patient volume and shown without a star).

FacilityCityChain5-Star ★
Martha's vineyard hospitalOak BluffsIndependent5
Fresenius medical care framinghamFRAMINGHAMFresenius Medical Care5
Fmc westwood dialysis center (bma westwood)WESTWOODFresenius Medical Care5
Fall river kidney center llcFALL RIVERAmerican Renal Associates5
Davita weymouth dialysisWEYMOUTHDaVita5
Davita north andover renal at homeNORTH ANDOVERDaVita5
Fmc peabody dialysis centerPEABODYFresenius Medical Care5
Fmc north shore regional dialysis centerBEVERLYFresenius Medical Care5
Fmc south county dialysis centerWEBSTERFresenius Medical Care5
Fresenius medical care of methuenMETHUENFresenius Medical Care5
The dialysis center at walthamWALTHAMAmerican Renal Associates5
Brockton regional kidney centerBROCKTONAmerican Renal Associates5
Fresenius medical care danversDANVERSFresenius Medical Care5
Ara auburn dialysis centerAUBURNAmerican Renal Associates5
Fresenius kidney care worcester county dialysisWORCESTERFresenius Medical Care5
Fresenius kidney care-oxfordSuttonFresenius Medical Care5
Davita mystic river home trainingMedfordDaVita5
Fmc - the kidney centerBOSTONFresenius Medical Care4
Fmc - cape cod artificial kidney center (bma cape cod)YarmouthPortFresenius Medical Care4
Brockton dialysis center, llcBROCKTONAmerican Renal Associates4
Fmc medford dialysis center (bma medford)MEDFORDFresenius Medical Care4
Fmc north suburban dialysis center (bma essex county)SAUGUSFresenius Medical Care4
Fmc south suburban dialysis facilityQUINCYFresenius Medical Care4
Fmc university dialysis center (bma of shrewsbury)SHREWSBURYFresenius Medical Care4
Davita brookline dialysisBROOKLINEDaVita4

Compliance posture

Methodology · Corrections log · Editorial policy

Built on the authoritative federal record

The primary sources, named on every page.

These are the federal agencies whose public datasets Fonteum ingests and attributes — the issuing authorities, not customers or partners. Every figure on the site links back to one of them.

  • CMS
  • HHS-OIG
  • HRSA
  • FDA
  • NLM
  • NUCC
  • Census
  • BLS
  • BEA

See the full source registry, with license and refresh cadence for each →

Reproducible by design

Every figure traces to its federal source.

14-tuple provenance

Every rendered fact ties to a source URL, dataset ID, snapshot date, row key, and SHA-256 — the full chain-of-custody record.

Reproducible SQL

Each study ships the exact query behind its figures, run against the cited federal snapshot. Re-run it yourself.

Daily reconciliation

Published counts are reconciled against the upstream federal datasets on a daily cadence, with drift logged.

Named medical review

Reviewed by Jennifer Montecillo, MD, medical reviewer. Non-practicing medical reviewer.

Read the full provenance and attestation methodology →

Two doors

Use the free API and open data

Query providers, facilities, sanctions, and quality scores — each field carrying its federal source. Self-serve, no call to start.

Explore the API →Browse the data catalog →

Talk to us

Managed pilots, enterprise terms, and audit-ready, signed attestation packages for compliance, risk, and research teams.

Talk to us →
Fonteum
Platform
Platform overviewAPIMCP serverFHIR R4 APIBulk exportAttestation & audit packReconciliationEntity graphSnapshots
Solutions
All solutionsExclusion & sanctions screeningCredentialing & enrichmentAudit evidenceProvider data for AI / RAGM&A & network diligenceCompliance & riskDevelopers & AI teams
Data & sources
Coverage & sourcesBrowse all datasetsState Medicaid exclusionsFreshnessMethodologyCare CompareSanctionsOwnershipStaffingDeficienciesSpecial Focus Facilities
Developers
Developer hubDocsAPI referenceQuickstartStatusChangelogSDKs & integrationsWebhooks
Research
Research hubHospital margin gapProvider access gapsGlossaryComparisonsCitationsWhy Fonteum
Company
AboutPressCustomersPricingContactEditorial policyCorrections
Trust & legal
TrustQualitySecurityPrivacy policyTerms of serviceMedical disclaimer

Reviewed by Jennifer Montecillo, MD, medical reviewer. Non-practicing medical reviewer.

© 2026 Fonteum LLC. All rights reserved.

·hello@fonteum.com

The U.S. healthcare graph AI can cite — every fact carries its source.

Request access→

The substrate, by the numbers

44federal source familiesDistinct CMS, OIG, HRSA, FDA and peer datasets
35dataset pagesCitable, downloadable /data catalog pages
67reproducible studiesEach shipping the SQL behind its figures