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CMS Care Compare — ASCCMS Care Compare — ASC Quality Measures (Facility)
U.S. Centers for Medicare and Medicaid Services · Tier-2 · profile-enrichment (renders on matched profiles)
Per-facility ASC quality measures (ASC-1 through ASC-12) submitted via the ASC Quality Reporting Program for ~5,611 Medicare-certified ambulatory surgical centers. Identity + NPI + state + per-measure rates and footnotes. **NPI IS PRESENT** (100% coverage) — the only Care Compare dataset that publishes NPI directly on the agency-level table.
How this source shows up on Fonteum.
Identity backbone for ASC CCNs (POS QIES coverage incomplete). Deterministic NPI bridge (no NPPES fuzzy match needed) — match-confidence improvement vs other Care Compare datasets. Drives the brand-hub `/care-compare/asc` module. ASC-12 (7-day risk-standardized hospital visit rate) is the headline quality measure.
What this source does NOT mean
ASCs do NOT have a CMS-published overall star rating (unlike NH / HH / Dialysis). Quality is per-measure (ASC-1 through ASC-12); Fonteum does not manufacture composite scores. Suppression for <25 cases applies.
Research and data questions this source supports.
- Build a state-level ambulatory surgical center directory with CMS quality measures (ASC-1 through ASC-12) and full provenance.
- Surface ASCs with NPI present to link surgical center profiles directly into the NPI identity graph — the only Care Compare file set with 100% NPI coverage.
- Compare ASC surgical safety measures (ASC-9: appropriate prophylactic antibiotic discontinued) across states for a quality research study.
- Cross-reference ASC CCNs against OIG LEIE for compliance screening before payer network contracting.
- Identify ASC ownership concentration by chain for a market structure analysis of the ambulatory surgery sector.
Dataset size: ~5,611 ASCs (May 2026 snapshot)
Per-field display contract.
Fields listed below show their configured `display_allowed` flag from the §94 provenance schema. Fields marked write-locked are captured for audit and are not rendered on profile pages.
Renders on profile
17 fieldsWhat we can’t infer from this source.
- Suppression for <25 cases — render `<DataAvailabilityState>` with explicit reason.
- SDOH measure newly required from 2025 reporting period — limited baseline comparison data for the first 2 years.
- No CMS-published overall star rating; quality is per-measure.
- `facility_id` is the source field name for CCN — ingestion normalizes to `ccn` for downstream consistency.
- Multi-year rows in source dataset; ingestion filters to most recent year and dedupes.
- Non-state jurisdictions present (PR, GU, VI, MP, AS).
Authority, license, publisher cadence.
Authority
U.S. Centers for Medicare and Medicaid Services
Tier
Tier-2 · profile-enrichment (renders on matched profiles)
Publisher / configured cadence
Declared or configured cadence: Annually by reporting year. Multi-year rows in the dataset; ingestion filters to the most recent year (2024 in the current snapshot). Not evidence of the latest loaded source date.
License
U.S. government public-domain works (17 U.S.C. § 105). Attribution required: 'Source: CMS Care Compare · ASC Quality Measures - Facility (4jcv-atw7) · Reporting Year {YYYY} · Snapshot {YYYY-MM-DD}'. License ↗
Official URL
Attribution requirement
Source: CMS Care Compare · ASC Quality Measures - Facility (4jcv-atw7) · Reporting Year {YYYY} · Last checked {YYYY-MM-DD}
What the source allows.
U.S. government public-domain works. PDC publishes the dataset at data.cms.gov/provider-data/dataset/4jcv-atw7 with explicit redistribution rights.
What a single field looks like in the graph.
This worked example shows the provenance shape used when a surfaced field has populated source, last-checked, display-rule, and confidence metadata. Individual fields may omit unavailable values.
Field
NPI presence + CCN format (snapshot 2026-05-07)
Sample value
5,611 facilities; reporting year 2024; 100% NPI presence; 100% 10-char CCN conformance
Provenance line
Source: CMS Care Compare · ASC Quality Measures - Facility (4jcv-atw7) · Reporting Year 2024 · Snapshot 2026-05-07 · Display rule: per-facility ASC-1 through ASC-12 + ASC-12 performance category render on /care-compare/asc module + per-facility pages
Official API, bulk download, and Fonteum endpoints.
Official API / download
Bulk download
Fonteum surface
Common questions about CMS Care Compare — ASC.
- What is the CMS Care Compare ASC dataset?
- The CMS Care Compare Ambulatory Surgical Centers (ASC) dataset contains identity and quality measure data for approximately 5,611 Medicare-certified ambulatory surgical centers. It includes CCN, NPI, facility name, address, ownership type, and performance on the ASC-1 through ASC-12 quality measures (patient safety: infection prevention, safe surgery, and patient experience).
- Why is the NPI field significant in the ASC dataset?
- The CMS Care Compare ASC dataset has 100% NPI presence — every facility row includes the facility NPI. This makes it the only Care Compare source that allows a direct CCN-to-NPI match without the fuzzy NPPES join required for the nursing home, home health, hospice, and hospital datasets. Fonteum uses this to link ASC facility profiles directly into the NPI identity graph.
- What are the ASC quality measures?
- CMS measures ambulatory surgical centers on measures ASC-1 through ASC-12, covering: patient burns (ASC-1), patient falls (ASC-2), wrong site/side/patient/procedure (ASC-3), prophylactic antibiotic timing and selection (ASC-4 and ASC-5), appropriate antibiotic discontinuation (ASC-9), hospital transfer rate (ASC-11), and outpatient surgery experience (ASC-12, CAHPS). Each measure is expressed as a percentage with a national benchmark.
- Where can I download the CMS ASC data?
- CMS publishes the ASC dataset in the CMS Provider Data Catalog. It is updated quarterly aligned to the Medicare ASC Quality Reporting Program schedule. The data is U.S. government public-domain — free to download and redistribute with attribution.
- How does an ASC differ from a hospital outpatient department?
- An ambulatory surgical center (ASC) is a Medicare-certified facility specializing in same-day surgical and diagnostic procedures in a lower-cost, non-hospital setting. Hospital outpatient departments (HOPDs) perform similar procedures but bill under the hospital's Medicare certification and command higher facility fees. CMS Care Compare covers ASCs separately from hospitals; their quality measures overlap but are not identical.
Where this source already shows up.
Related sources in the graph
- /sources → The generated source-catalog subset — documented datasets Fonteum cites.
- /data-provenance → The provider graph — pipeline diagram, source-family clusters, field-level provenance examples, display rules.
- /methodology → Documented sourcing, publisher cadence, observed freshness, and corrections policy.
- /editorial-policy → Independence, sourcing, conflicts, corrections, retractions.