Objectives: Though there are many studies about sleep disorder, no research has been performed on the utilization of oriental medicine as a treatment. Therefore, the oriental medical treatment pattern of Korean patients with sleep disorders was examined herein using the Health Insurance Review and Assessment Service (HIRAS). Methods: The medical records of patients with sleep disorders (G47) or nonorganic sleep disorders (F51) as a main diagnosis were adopted from the HIRAS database from 2011 to 2013. Analysis was performed on the number of patients and cost per patient, with comparison between oriental and western medicine in terms of gender, age, patient care service type, and hospital type. Results: 1) Regarding sleep disorders, the medical visits and insurance charges have been increasing. Western medicine was utilized 8 times more often than oriental medicine during 3 years. 2) There were 2.5 times more women than men. 3) Among all ages, the 50~59 year group had the highest representation. 4) In comparison of average portions of patient care type over 3 years, outpatients were the majority, while the number of visits of outpatients and hospitalization has been increasing. 5) Comparison of average portion of oriental hospital type over 3 years revealed oriental clinics to be used most. The use of general hospitals was higher in western medicine treatment, while public health centers used oriental medicine more. 6) Regarding average oriental medical cost per patient over 3 years, the total was 88,000 won, with 353,000 won for hospitalization and 85,000 won for outpatients. The outpatient cost has been increasing. 7) In line with 6, oriental medical hospitals cost 126,000 won, local clinics were 85,000 won, and etc. was 95,000 won. Average costs of all types have increased during 3 years, except oriental medical hospitals in 2013. Conclusions: This study provided objective information about the epidemiologic characteristic of oriental medicine used for treatment of sleep disorder. For expansion of oriental medical demand for sleep disorder, this study would be helpful in understanding the recent status.