This is a cohort study to analyse the role of diabetes mellitus as contributory factor of all mortalities using secondary data from record section of Centenary Hospital. For last 5 years (ie, 2016 to 2020) mortalities from all causes where diabetes was associated have been recorded. It was found that during this period a total of 13,663 cases were admitted. Out of total mortality of 1110 cases, 340 cases (196 males and 144 females) had associated diabetes mellitus.Most of the patients were within 70 to 89 years age group. Among the different causes of mortalities among diabetics, sepsis was found to be the most prevalent, followed by cerebrovascular accident, compromised urinary system and compromised cardiovascular system respectively