Subject. At the present stage of society development cancer incidence remains among the most pressing medical and social problems. In the structure of oncopathology a special place is occupied by malignant neoplasms of lymphoid and hematopoietic tissues which include chronic myeloid leukemia (CML). In some patients, the disease can appear with dental symptoms associated with a decrease in local immunity of the oral cavity — the appearance of aphthae, plaque on the oral mucosa, angular cheilosis, bleeding gums, dry mouth. It is diagnostically significant that such oral symptoms may precede general clinical symptoms, that is, they can be considered as early symptoms of CML. In addition, their severity often prompts a patient with CML to see a dentist. Thus, the importance of the professional knowledge of the dentist in general clinical and dental symptomatology of CML, the correct routing of the patient for further clinical and laboratory examination, treatment and observation by a hematologist is undeniably high. The goal is to study and identify the features of the dental status of patients with chronic myeloid leukemia. Methodology. The work carried out a comprehensive assessment of the state of the oral cavity and the need for dental treatment of patients with chronic myeloid leukemia in which patients with preserved systemic status and patients with chronic myeloid leukemia took part. Results. According to the results of a complex dental examination and the calculation of the main dental indices, patients with CML were found to have serious disorders in the state of their oral health. Conclusions. Patients with CML showed a high need for various types of dental care, primarily in conservative oral cavity sanitation, periodontal treatment and rationalization of oral hygiene protocols (professional and individual).