GREECE ASC LLC DBA CORNERSTONE SURGERY CENTER
GREECE ASC LLC DBA CORNERSTONE SURGERY CENTER is a Medicare-certified ambulatory surgical center in ROCHESTER, NY (CCN 33C0001189). NPI 1780206292 links this facility deterministically to NPPES and other federal datasets. Quality data is from reporting year 2024. Fonteum publishes CMS Care Compare ASC quality measures for this facility, each sourced directly from the CMS Provider Data Catalog (data.cms.gov/provider-data/dataset/4jcv-atw7).
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 Ambulatory Surgical Center (4jcv-atw7) · View on Medicare.gov
What CMS quality measures does Fonteum publish for GREECE ASC LLC DBA CORNERSTONE SURGERY CENTER?
Fonteum publishes CMS Care Compare ASC quality measures for GREECE ASC LLC DBA CORNERSTONE SURGERY CENTER, each sourced directly from the CMS Provider Data Catalog (dataset 4jcv-atw7).
How does Fonteum cover ambulatory surgical center 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 ambulatory surgical center to its sources?
GREECE ASC LLC DBA CORNERSTONE SURGERY CENTER (CCN 33C0001189) is identified across CMS Care Compare Ambulatory Surgical Center (4jcv-atw7) published on data.cms.gov. Every field on this page is chained to its source dataset and row.
How is this ambulatory surgical center’s data sourced and attested?
Each field on this page is sourced from the CMS Care Compare Ambulatory Surgical Center (4jcv-atw7) 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 Ambulatory Surgical Center (4jcv-atw7) file from data.cms.gov.
- Entity resolution — key every row to the ambulatory surgical center’s CMS Certification Number (CCN 33C0001189).
- 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 Ambulatory Surgical Center (4jcv-atw7) · archived copyCenters for Medicare & Medicaid Services · US Government Work
- Medicare.gov Care Compare — GREECE ASC LLC DBA CORNERSTONE SURGERY CENTERCenters for Medicare & Medicaid Services · US Government Work
Frequently asked questions
- How many CMS quality measures does Fonteum track for GREECE ASC LLC DBA CORNERSTONE SURGERY CENTER?
- Fonteum tracks seven CMS Care Compare quality measures for GREECE ASC LLC DBA CORNERSTONE SURGERY CENTER: ASC-1 (patient burn rate), ASC-2 (unplanned transfer/admission), ASC-3 (wrong site/procedure), ASC-4 (all-cause readmission), ASC-9 (antibiotic prophylaxis), ASC-11 (cataract complication), and ASC-12 (colonoscopy follow-up category). Each value is sourced from CMS dataset 4jcv-atw7 as of reporting year 2024.
- What is the NPI for GREECE ASC LLC DBA CORNERSTONE SURGERY CENTER?
- GREECE ASC LLC DBA CORNERSTONE SURGERY CENTER has NPI 1780206292, making it part of the ~100% of CMS Care Compare ASC facilities with a deterministic NPI bridge. This NPI links the facility across NPPES, PECOS, and other federal datasets without fuzzy matching.
- Where does GREECE ASC LLC DBA CORNERSTONE SURGERY CENTER's quality data come from?
- GREECE ASC LLC DBA CORNERSTONE SURGERY CENTER's quality data is drawn from the CMS Care Compare Ambulatory Surgical Center dataset (data.cms.gov/provider-data/dataset/4jcv-atw7), a US Government Work published by CMS. Fonteum re-publishes each value with provenance metadata tracing it to its source row and reporting period.
- What does CMS Certification Number 33C0001189 identify?
- The CMS Certification Number (CCN) 33C0001189 is the federal identifier Medicare assigns to GREECE ASC LLC DBA CORNERSTONE SURGERY CENTER in ROCHESTER, NY. It is unique, federally issued, and links this facility across CMS datasets including Care Compare, Provider of Services, and cost reports.
- Why are some measure values suppressed for GREECE ASC LLC DBA CORNERSTONE SURGERY CENTER?
- CMS suppresses measure values when a facility has fewer than 11 qualifying cases in a reporting period (footnote "5"). Suppressed measures appear as "Suppressed (<11 cases)" on this page. Suppression does not indicate poor quality — it is a CMS methodology requirement to protect patient privacy.
- Why is ASC-12 shown as a category rather than a percentage?
Related facilities and datasets
GREECE ASC LLC DBA CORNERSTONE SURGERY CENTER is a Medicare-certified ambulatory surgical center identified by CMS Certification Number 33C0001189. Data sourced from the CMS Care Compare Ambulatory Surgical Center (4jcv-atw7) (data.cms.gov), a US Government Work. Methodology · Report an error · Medicare.gov