Background: The relationship between diabetes mellitus (DM) and hearing loss has been discussed for a long time. Several studies have found a possible correlation between the duration of diabetes mellitus and hearing loss. Objectives: This study aims to determine the average hearing threshold in patients with diabetes mellitus. Methods: This study is a descriptive observational study with a cross-sectional design. The population in this study were all patients with diabetes mellitus at the Internal Medicine Clinic, Sari Dharma Clinic, Denpasar. The samples taken were patients with a history of Diabetes mellitus based on the doctor's diagnosis at the Internal Medicine Clinic of the Sari Dharma Clinic. The variables in this study were gender, age, duration of suffering from diabetes mellitus and hearing threshold. Results: This study consisted of six male patients (50%) and six female patients (50%). The age of the majority of patients was 56-65 years old (50%), while the lowest was 26-35 years old (0%). From the results of the hearing examination, it was found that the most common hearing in the right ear was normal hearing (58.3%), while in the left ear was normal hearing (41.7%). Most patients who experienced hearing loss were 56-65 years old (57.1%). Conclusion: There is hearing loss in diabetes mellitus patients at the Internal Medicine Clinic, Sari Dharma Clinic.