Max Rady College of Medicine

Term: Ambulatory Diagnostic Groups (ADG)

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Glossary Definition

Last Updated: 2013-09-19


Now known as Aggregated Diagnosis Groups® , Ambulatory Diagnostic Groups were used in earlier versions (prior to 2001, version 5 release) of the Johns Hopkins Adjusted Clinical Group® (ACG®) case-mix system when it was called the Ambulatory Care Group (ACG) system. While more recent ACG Groupers assign patients into one of 32 ADGs based on 5 clinical and expected utilization criteria, earlier versions of the software assigned a patient into Ambulatory Diagnosis Groups (ADGs) based on the following eight criteria:

    1) clinical similarity;
    2) likelihood of persistence/recurrence of the condition over time;
    3) likelihood that patient will return for repeat visit/continued treatment;
    4) likelihood of specialty consultation or referral;
    5) expected need and cost of diagnostic and therapeutic procedures for the condition;
    6) expected need for a required hospitalization;
    7) likelihood of associated disability; and
    8) likelihood of associated decreased life expectancy.
A crude measure of significant morbidity burden is the presence of three or more ADGs in a given time period. Note: The use of ADGs has been updated. Please see definition for Aggregated Diagnosis Groups (ADGs).

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Term used in 

  • Doupe M, Brownell M, Kozyrskyj A, Dik N, Burchill C, Dahl M, Chateau D, De Coster C, Hinds A, Bodnarchuk J. Using Administrative Data to Develop Indicators of Quality Care in Personal Care Homes. Winnipeg, MB: Manitoba Centre for Health Policy, 2006. [Report] [Summary] [Additional Materials] (View)

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Manitoba Centre for Health Policy
Community Health Sciences, Max Rady College of Medicine,
Rady Faculty of Health Sciences,
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University of Manitoba
Winnipeg, MB R3E 3P5 Canada