Hepatic encephalopathy (HE) is a serious complication of the hepatobiliary region. One of the main consequences of the pathology is dysfunction of the brain. Diagnosis of this condition can be challenging due to the variety of clinical manifestations and severity. The key to preventing the HE progression and improving the patient’s quality of life is diagnosis in the early stages of the disease. The use of psychometric tests appears promising in determining HE due to their high sensitivity and low cost. It should be noted that results may vary depending on a number of factors, including the age and level of education of the patient. In order to assess the full picture of the disease, it is necessary to conduct an extensive evaluation and combine various examination methods, such as clinical scales, psychometric tests, and computerized tests, to achieve the most accurate diagnosis and determine the severity of HE.