National Anesthesia Clinical
Outcomes Registry

The Anesthesia Quality Institute (AQI) is home to the National Anesthesia Clinical Outcomes Registry (NACOR), a data warehouse designated as a Qualified Registry (QR) and a Qualified Clinical Data Registry (QCDR) by the Centers for Medicare & Medicaid Services (CMS) for Physician Quality Reporting System (PQRS) reporting. With millions of cases, AQI's clinical data provides an evidence-based rationale that informs treatment choices and helps control treatment costs.

NACOR is intended for all anesthesia providers in all practice settings. The registry provides participating providers with:

  • Custom continuous performance monitors
  • Performance gap analysis and patient outlier identification
  • Access to improvement interventions to close performance gaps including patient care management tools, targeted education, and links to anesthesia information technology vendors
  • Peer-to-peer benchmarks

Data Definitions NEW for 2017

NACOR Data Element Conceptual Definitions

NACOR Minimum Data Set Conceptual Definitions

NACOR Outcomes Data Set Conceptual Definitions

NACOR Administrative Data Conceptual Set Definitions

Reporting Outcomes/Adverse Events (excluding CMS measure data)

  • If a practice is reporting outcomes to NACOR, a blank outcome field is represented in the database as "no adverse event." Ideally, the most accurate capture is to record 'yes' or 'no' to an adverse event for every case. We recognize that many practices are capturing outcomes on paper or some other manual system where clicking a box 'yes' or 'no' for every case may be resource intense and interrupt workflow.

  • Outcomes definitions have been standardized and are posted on our website. For 2017, all vendors and groups should report based on the definitions provided.

  • Outcomes reported separately from NACOR's minimum dataset cannot be loaded until the coinciding case is in NACOR. Files are joined by the unique anesthesia case ID provided in both files.


Participants have continuous online access to NACOR reports regarding their practice. Reports allow participants to identify gaps in specific quality measures and focus efforts to close those gaps. Performance tracking reports capture trends over time and help measure improvements in quality care. NACOR also provides participants with access to national benchmarking reports.

Identify Outliers

NACOR participants also can improve care by reviewing performance results across their patient population, which can help address clinical gaps in a timely manner. Consider and choose interventions that can lead to sustainable practice improvement for your aggregate performance, which can help reduce the number of outliers in the future.


NACOR identifies possible interventions for improvement based on clinical quality gaps found through calculating selected data. Data can be used to review performance and quickly determine the impact of an improvement intervention. Results are presented graphically to identify trends in performance.

Steps for becoming a NACOR participant

NACOR participants range from pen-and-paper anesthesiology practices to the most wired academic centers. You do not need an AIMS system or electronic health record (EHR) to participate.

NACOR participation requires close collaboration between the anesthesia practice, its providers and healthcare technology vendors. Roles are defined as follows:

AQI Key Roles

  • Define data and outcomes collected in NACOR
  • Provide unifying definitions and templates
  • Contract with individual practices and hospitals to exchange data
  • Report collected data

Individual Anesthesia Practices, Hospitals and Providers Key Roles

  • Provide data to NACOR
  • Use reports to improve patient care to meet various local, state and federal regulatory requirements

Vendors of Anesthesia Information Technology Key Roles

  • Facilitate NACOR reporting with practices; vendors that provide formatted data for contribution to NACOR will be listed as AQI Vendors