NNA SAN MARCOS
NNA SAN MARCOS is a Medicare-certified dialysis facility in SAN MARCOS, TX, identified by CMS Certification Number 452522. CMS assigns it a 4 / 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 NNA SAN MARCOS?
Fonteum publishes CMS Care Compare quality data for NNA SAN MARCOS, 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?
NNA SAN MARCOS (CCN 452522) 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 452522).
- 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 — NNA SAN MARCOSCenters for Medicare & Medicaid Services · US Government Work
Frequently asked questions
- What is the CMS 5-star rating for NNA SAN MARCOS?
- NNA SAN MARCOS holds a CMS 5-star rating of 4 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 NNA SAN MARCOS chain-owned?
- Yes. NNA SAN MARCOS is chain-owned, affiliated with Fresenius Medical Care. Chain affiliation is reported to CMS and published in the Care Compare Dialysis dataset (23ew-n7w9).
- What dialysis services does NNA SAN MARCOS offer?
- NNA SAN MARCOS 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 452522?
- The CMS Certification Number (CCN) 452522 is the federal identifier Medicare assigns to NNA SAN MARCOS in SAN MARCOS, TX. 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 NNA SAN MARCOS's records.
Related facilities and datasets
NNA SAN MARCOS is a Medicare-certified dialysis facility identified by CMS Certification Number 452522. Data sourced from the CMS Care Compare Dialysis Facility (23ew-n7w9) (data.cms.gov), a US Government Work. Methodology · Report an error · Medicare.gov