comorbidity

noun

co·​mor·​bid·​i·​ty -mȯr-ˈbid-ə-tē 

plural comorbidities

: a comorbid condition

diabetes patients tend to present with a long list of comorbidities

—Fred Gebhart

also : the occurrence of comorbid conditions : occurrence as a comorbid condition

the hallmark of depression in older people is its comorbidity with medical illness

—United States Department of Health & Human Services