Objective: The aim of this study was to examine how common is LOH in Latvian men and to determine the target audience that needs screening for LOH. Design and Method: 300 men over the age of 40 who came to their family doctors and to sexologists were asked to complete the questionnaires for Aging Male Symptoms Rating Scale. Men were divided in three groups based on their age: 40-49 years old, 50-59 years old, and >59 years old. The men who according to the AMS questionnaires had suspicion of LOH symptoms were asked to check their level of testosterone in the blood serum. The authors also have summarized the data on the spread of different chronic diseases among the men. Results: 134 men were asked to check level of testosterone in the blood serum. 29% of men appeared to have hypogonadism. 38% of this men appeared to have adiposity, 77% - hypertension, 18% – diabetes, 51% – dislipidemia, 66%– erectile dysfunction. Among men with normal testosterone level adiposity was found in 29%, hypertension-in 56%, diabetes-in 5%, dislipidemia-in 39%, erectile dysfunction-in 61%. Significantly in hypogonadal men in the group 50-59 years was more frequent hypertension, and in all groups – diabetes mellitus. Conclusions: 1/3 of men aged 40 and older have diagnosis of LOH in the groups under research. It is necessary to check testosterone and free testosterone level: in all men 50-59 years old with arterial hypertension; in all men over the age of 40 with diabetes.