AHRQ--Agency for Healthcare Research and Quality: Advancing Excellence in Health Care

Inpatient Quality Indicators Overview

What are Inpatient Quality Indicators?

The Inpatient Quality Indicators (IQIs) provide a perspective on quality of care inside hospitals, including:

  • Inpatient mortality for surgical procedures and medical conditions;
  • Utilization of procedures for which there are questions of overuse, underuse, and misuse;
  • Volume of procedures for which hospital procedure volume is an important indicator of performance.

How are Inpatient Quality Indicators used?

The IQIs can be used to help hospitals assess quality of care inside the hospital and identify areas that might need further study.

For more information about the Inpatient Quality Indicators, download the Inpatient Quality Indicators Brochure.

Inpatient Quality Indicators Resources

  • Individual Measure Technical Specifications (v2018 and v2018.0.1 ICD-10-CM/PCS coding)

    Breaks down calculations used to formulate each IQI, including a brief description of the measure, numerator and denominator information, and details on cases that should be excluded from calculations.- New!

  • Individual Measure Technical Specifications (v6.0 ICD-9-CM coding only)

    Breaks down calculations used to formulate each IQI, including a brief description of the measure, numerator and denominator information, and details on cases that should be excluded from calculations.

  • Parameter Estimates (v6.0 ICD-9-CM coding only)*

    Tables of IQI covariates and coefficients for risk adjustment logistic regression models.

  • Benchmark Data Tables (v6.0 ICD-9-CM coding only)*

    Tables of nationwide comparative rates for IQIs including observed rate, numerator, and denominator data for each indicator overall and stratified by sex, age group, and insurance status.

  • Log of Coding Updates and Revisions for the v2018 ICD-10-CM/PCS and v6.0 ICD-9-CM versions

    Tables summarizing revisions made to the IQI software, software documentation and technical specifications since the original release of these documents in November 2001.
    - New!

*Parameter Estimates and Benchmark Data will be published in the future once the risk adjustment is added to the ICD-10-CM/PCDS software.

To access prior versions of the IQI resources, visit the Archives page.

  • AHRQ Composite Measures Workgroup

    This report summarizes the work of the IQI Composite Measure Workgroup, which assisted AHRQ in developing a composite measure based on the Inpatient Quality Indicators. For more information on Composite Workgroups, visit the AHRQ QI Composite Workgroups page.

  • AHRQ IQI Development

    How the IQI measure set was developed.

  • Retirement of the Area-Level Inpatient Quality Indicators (IQIs)

    Starting with V7.0 ICD-10-CM/PCS, all versions of the QI software will not include any area-level IQIs. For additional information, see the retirement announcement.

Quality Indicator Software

Visit the AHRQ QI Software Page for more information on the Quality Indicators SAS QI and WinQI software.

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