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Clinical terms

Comorbidity

A comorbidity is another health condition a person has at the same time as the main condition being assessed or treated. For example, high blood pressure or kidney disease may be listed as comorbidities in a report about type 2 diabetes.

Also called
co-existing condition, comorbid condition
Formerly called

What it means

Comorbidity is closely related to multimorbidity, which means living with 2 or more chronic conditions at the same time. The difference is the point of view: a comorbidity is described in relation to one main, or index, condition, and which condition is the main one depends on who is looking. The Australian Institute of Health and Welfare estimated that in 2022, 38% of Australians had multimorbidity, rising to 79% of people aged 85 and over.

In an allied health report, comorbidities are listed because they change what is safe and what will work. Heart disease may change how an exercise programme is built, kidney disease may change dietary advice, and reduced feeling in the feet changes foot care. People with several conditions often take several medicines and see several health professionals, so a coordinated plan and a shared, up-to-date list of conditions and medicines helps everyone stay on the same page.

At PDC Health Hub
PDC Health Hub's multidisciplinary team includes diabetes educators, dietitians, exercise physiologists, physiotherapists, podiatrists and pharmacists, and GP case conferences are a listed service.

Sources and clinical review

Clinically reviewed by
Jeffery Au
Last reviewed:
October 16, 2026
Next review due:
October 15, 2027

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