Background: long-term oxygen therapy (LTOT) for chronic lung diseases associated with chronic hy-poxemia is effective in terms of increasing life expectancy. However, by now, the costs of LTOT are not reimbursed by the healthcare system of the Russian Federation. Aim: to evaluate the economic efficiency of respiratory therapy centers in providing pa-tients with chronic lung diseases and severe chronic hypoxemia with LTOT at home. Patients and Methods: direct medical and nonmedical costs associated with the introduc-tion of LTOT into clinical practice were identified and calculated. Costs of LTOT, outpatient management of patients without exacerbations, treatment for exacerbations, and disability-related payments were considered. Clinical and economic modeling was performed. A cost-effectiveness analysis was performed and the budget impact was assessed. Published data and the experience of St. Petersburg Regional Respiratory Support Center were used to evaluate LTOT efficacy. Results: additional costs for LTOT per patient for 5 years are 229,759 RUB. LTOT signif-icantly (by 74%) reduce the costs of treating patients with exacerbations of chronic obstructive pulmonary disease, mainly due to a reduction in exacerbation rate, including those requiring ad-mission to hospital. Analysis of budget impact over 5 years demonstrates a decrease in direct medical costs per 100 oxygen concentrators by 32% (from 181,666,728.90 RUB to 123,247,630.82 RUB). Given mortality, the estimated number of patients opting for LTOT using 100 oxygen concentrators over 5 years is 150. Conclusions: reimbursement for LTOT costs in Russian healthcare is economically reason-able. © 2023, Meditsina-Inform LLC. All rights reserved.