Inclusion Criteria:  Availability of a signed informed consent form; or the presence of a disinterested witness if the patient is unable to examine and sign the consent form due to illiteracy or disability (for example, in the case of blindness); The patient has a documented diagnosis of ulcerative colitis or Crohn's disease (endoscopy, histology, if indicated by radiation diagnostics); Patients who have applied for treatment or are already taking treatment from a gastroenterologist / coloproctologist, including inpatients; Citizenship of the Republic of Kazakhstan (or resides).  Exclusion Criteria:  Patient takes part in an interventional clinical trial; Patient is unable to follow the schedule of the visits; Any condition that the PI believes would prevent a study participant from participating in the study.