Background of study: Hyperglycemia often occurs in critically ill patients even without a history of diabetes. Hyperglycemia, in hospital, according to the American Diabetes Association (ADA) is defined as a condition in which blood glucose levels are ≥140 mg/dl and HbA1c ≤6.5, without any prior diabetes history. Hyperglycemia results from an endocrine and metabolic response to stress. Studies and literature regarding hyperglycemia in non-diabetic patients in Indonesia are deemed limited, especially case studies of non-diabetic hyperglycemia in intensive care and the prevalence of hyperglycemia related to age, sex, metabolic risk (obesity, hypertension, dyslipidemia), history of parenteral nutrition, history of corticosteroids use, and disease diagnosis. Methods: The present study is a retrospective descriptive study using medical record data of patients at the HCU, ICU, Brain Center, and CVCU PJT Wahidin Sudirohusodo Hospital in August 2020 - October 2020. This study involved 90 non-diabetic subjects in intensive care. The inclusion criteria were based on the ADA criteria for non-diabetic hyperglycemia in the hospital. Results: This study involved 44 non-diabetic hyperglycemic patients and 46 non-diabetic patients without hyperglycemia with a mean age of 53.5 years in non-diabetic hyperglycemic subjects and 57.7 years old in subjects without hyperglycemia. Non-diabetic hyperglycemia subjects with obesity (34.1%), hypertension (61.5%), and dyslipidemia (46.9%). Subjects with hyperglycemia with a history of corticosteroid use (95%). Based on the diagnosis of the disease when the subject was in intensive care, the subject with a diagnosis of CHD had hyperglycemia (36.8%), stroke with hyperglycemia (58.8%), and other diagnoses (infection, tumor, postoperative, and trauma) accompanied by hyperglycemia (57, 1%). There was a ignificant relationship between hypertension, history of corticosteroid use, and hyperglycemia in non-diabetes (p <0.05). Conclusion: The history of corticosteroids use and hypertension is associated with the occurrence of hyperglycemia in non-diabetic patients in intensive care.