This study aimed to estimate the prevalence of multimorbidity in family practice patients by counting the number of chronic medical conditions and using the Cumulative Illness Rating Scale (CIRS) to consider the severity of these conditions. The study was conducted in the Saguenay region of Quebec, Canada, in 2003, involving 21 family physicians and their adult patients. The sample included 320 men and 660 women, with 9 out of 10 patients having more than one chronic condition. The prevalence of having two or more medical conditions increased significantly with age, reaching 99% among women and 97% among men in the 65 years and older age group. The mean number of conditions and mean CIRS score also increased with age. The study concluded that multimorbidity is highly prevalent and increases significantly with age in both men and women, highlighting the need for improved healthcare models and interventions to address the challenges posed by this condition.This study aimed to estimate the prevalence of multimorbidity in family practice patients by counting the number of chronic medical conditions and using the Cumulative Illness Rating Scale (CIRS) to consider the severity of these conditions. The study was conducted in the Saguenay region of Quebec, Canada, in 2003, involving 21 family physicians and their adult patients. The sample included 320 men and 660 women, with 9 out of 10 patients having more than one chronic condition. The prevalence of having two or more medical conditions increased significantly with age, reaching 99% among women and 97% among men in the 65 years and older age group. The mean number of conditions and mean CIRS score also increased with age. The study concluded that multimorbidity is highly prevalent and increases significantly with age in both men and women, highlighting the need for improved healthcare models and interventions to address the challenges posed by this condition.