Despite the success of the development of domestic geriatrics, a classification of geriatric pathology has not yet been developed. The lack of classification of geriatric syndromes and geriatric diseases inhibits the development of geriatrics. At the end of the last century, when a serious attempt was made to organize a domestic geriatric service, the profile of geriatric reception was defined as «providing specialized inpatient and consultative diagnostic medical care to the elderly and senile population and persons with signs of premature aging of the body.» Order No. 297 did not say a word about diseases and pathological processes associated with aging, although the preamble to it indicated that the need for hospitalization for certain types of specialized medical care (cardiology, endocrinology, pulmonology, urology, ophthalmology, neurology, psychiatry and others) for older people is 1.5—3 times higher than similar indicators for the able-bodied population. The lack of nosological specification of geriatric admission led to uncontrolled referral of the entire flow of age-related patients to the geriatric office.The authors carried out an analysis of publications, an analysis of existing profile classifications, as well as an analysis of their own research data. The authors have developed a register of seventy-seven geriatric diseases and syndromes, clarified their criteria and cause-and-effect relationships.