MOUNT SINAI SOUTH NASSAU OUTPATIENT DIALYSIS CENTER
MOUNT SINAI SOUTH NASSAU OUTPATIENT DIALYSIS CENTER is a Medicare-certified dialysis facility in OCEANSIDE, NY, identified by CMS Certification Number 333535. CMS assigns it a 5 / 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 MOUNT SINAI SOUTH NASSAU OUTPATIENT DIALYSIS CENTER?
Fonteum publishes CMS Care Compare quality data for MOUNT SINAI SOUTH NASSAU OUTPATIENT DIALYSIS 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?
MOUNT SINAI SOUTH NASSAU OUTPATIENT DIALYSIS CENTER (CCN 333535) 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 333535).
- 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 — MOUNT SINAI SOUTH NASSAU OUTPATIENT DIALYSIS CENTERCenters for Medicare & Medicaid Services · US Government Work
Frequently asked questions
- What is the CMS 5-star rating for MOUNT SINAI SOUTH NASSAU OUTPATIENT DIALYSIS CENTER?
- MOUNT SINAI SOUTH NASSAU OUTPATIENT DIALYSIS CENTER holds a CMS 5-star rating of 5 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 MOUNT SINAI SOUTH NASSAU OUTPATIENT DIALYSIS CENTER chain-owned?
- No. MOUNT SINAI SOUTH NASSAU OUTPATIENT DIALYSIS CENTER is an independent (non-chain-owned) facility per the CMS Care Compare Dialysis dataset.
- What dialysis services does MOUNT SINAI SOUTH NASSAU OUTPATIENT DIALYSIS CENTER offer?
- MOUNT SINAI SOUTH NASSAU OUTPATIENT DIALYSIS CENTER offers the following dialysis services: in-center hemodialysis, home hemodialysis training. Service availability is reported by the facility to CMS and published in the CMS Care Compare Dialysis dataset.
- What is CMS Certification Number 333535?
- The CMS Certification Number (CCN) 333535 is the federal identifier Medicare assigns to MOUNT SINAI SOUTH NASSAU OUTPATIENT DIALYSIS CENTER in OCEANSIDE, 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 MOUNT SINAI SOUTH NASSAU OUTPATIENT DIALYSIS CENTER's records.
Related facilities and datasets
MOUNT SINAI SOUTH NASSAU OUTPATIENT DIALYSIS CENTER is a Medicare-certified dialysis facility identified by CMS Certification Number 333535. Data sourced from the CMS Care Compare Dialysis Facility (23ew-n7w9) (data.cms.gov), a US Government Work. Methodology · Report an error · Medicare.gov