NASSAU UNIVERSITY MEDICAL CENTER
NASSAU UNIVERSITY MEDICAL CENTER is a Medicare-certified dialysis facility in UNIONDALE, NY, identified by CMS Certification Number 333555. CMS assigns it a 3 / 5 rating. Fonteum publishes provenance-tracked CMS quality data for this facility, each traced to the CMS Care Compare Dialysis dataset (23ew-n7w9).
Fonteum is a US healthcare provenance registry that publishes signed, chain-of-custody-attested research and data pages on Medicare, Medicaid, and federal regulator datasets, drawing from 23 federal source families across CMS, OIG, HRSA, AHRQ, and HHS.
Data last updated: 2026-05-07 · Source: CMS Care Compare Dialysis Facility (23ew-n7w9) · View on Medicare.gov
What quality data does CMS publish for NASSAU UNIVERSITY MEDICAL CENTER?
Fonteum publishes CMS Care Compare quality data for NASSAU UNIVERSITY MEDICAL CENTER, each field traced to the CMS Care Compare Dialysis dataset (23ew-n7w9) and its reporting period.
How does Fonteum cover dialysis facility quality data?
Fonteum indexes quality data from 23 federal source families, including all six CMS Care Compare facility programs. Each CCN is keyed to its primary CMS dataset — every field traced to a source row and reporting period.
CMS Care Compare · 6 facility types · data.cms.gov · US Government Work
How does Fonteum connect this dialysis facility to its sources?
NASSAU UNIVERSITY MEDICAL CENTER (CCN 333555) is identified across CMS Care Compare Dialysis Facility (23ew-n7w9) published on data.cms.gov. Every field on this page is chained to its source dataset and row.
How is this dialysis facility’s data sourced and attested?
Each field on this page is sourced from the CMS Care Compare Dialysis Facility (23ew-n7w9) published on data.cms.gov — a US Government Work. Fonteum re-publishes each value with a provenance record identifying the federal source, release date, and redistribution basis.
- Source acquisition — download the CMS Care Compare Dialysis Facility (23ew-n7w9) file from data.cms.gov.
- Entity resolution — key every row to the dialysis facility’s CMS Certification Number (CCN 333555).
- Field projection — extract the fields shown on this page.
- Quality checks — drop rows CMS suppresses or marks not available.
- Chain attestation — sign each field into the Fonteum provenance graph.
Read the full Fonteum provenance methodology or browse the 23 federal source families behind every page.
Which CMS datasets back this page?
- CMS Care Compare Dialysis Facility (23ew-n7w9) · archived copyCenters for Medicare & Medicaid Services · US Government Work
- Medicare.gov Care Compare — NASSAU UNIVERSITY MEDICAL CENTERCenters for Medicare & Medicaid Services · US Government Work
Frequently asked questions
- What is the CMS 5-star rating for NASSAU UNIVERSITY MEDICAL CENTER?
- NASSAU UNIVERSITY MEDICAL CENTER holds a CMS 5-star rating of 3 out of 5. CMS calculates this rating from quality measures including patient outcomes, clinical measures, and patient experience data from the CMS Care Compare program.
- Is NASSAU UNIVERSITY MEDICAL CENTER chain-owned?
- No. NASSAU UNIVERSITY MEDICAL CENTER is an independent (non-chain-owned) facility per the CMS Care Compare Dialysis dataset.
- What dialysis services does NASSAU UNIVERSITY MEDICAL CENTER offer?
- NASSAU UNIVERSITY MEDICAL CENTER offers the following dialysis services: in-center hemodialysis, peritoneal dialysis. Service availability is reported by the facility to CMS and published in the CMS Care Compare Dialysis dataset.
- What is CMS Certification Number 333555?
- The CMS Certification Number (CCN) 333555 is the federal identifier Medicare assigns to NASSAU UNIVERSITY MEDICAL CENTER in UNIONDALE, NY. It is unique, federally issued, and links this facility across CMS datasets — including Care Compare, Provider of Services, and cost reports — which is how Fonteum joins NASSAU UNIVERSITY MEDICAL CENTER's records.
Related facilities and datasets
NASSAU UNIVERSITY MEDICAL CENTER is a Medicare-certified dialysis facility identified by CMS Certification Number 333555. Data sourced from the CMS Care Compare Dialysis Facility (23ew-n7w9) (data.cms.gov), a US Government Work. Methodology · Report an error · Medicare.gov