The objective of this study was to analyze the influence of the hospital and insurer in causing delayed reimbursement of medical insurance benefits. We analyzed major variables at three different sized hospitals to examine the effect of the hospital and insurer using the two-way ANOVA method. The results were as follows: 1. The time interval between claim by hospitals and payment of the benefit was statistically different according to hospital in both admission and outpatient care. 2. The time needed by the insurer for investigating the claimers was statistically different according to hospital and insurer in both admission and outpatient care. There was interaction between the hospital and insurer factors in outpatient care. 3. Although there was interaction between the hospital and insurer factors in admission care, the time interval between claim and payment was statistically different. In outpatient care, the payment interval between claim and payment was also statistically different according to the hospital and insurer.
Ambulatory Care ; Insurance Benefits* ; Insurance Carriers ; Insurance*

OBJECTIVE: This study examined the Risk Sharing Agreement (RSA) on pharmaceutical pricing system in Korean national health insurance. Through RSA, the insurer was able to maintain the principles in the price listing process while managing the budget effectively and improving patient access to new drugs. Despite these positive effects, there are still issues raised by some stakeholders, such as lack of transparency in the listing process and doubts about its effectiveness. Therefore, we investigated the impacts of RSA on national health insurance financing and patient access to analyze the effects of RSA. METHODS: The impact of RSA was investigated by analyzing the health insurance claims data for 2014~2016. The degree of improvement in patient access was determined by the decreased amount of patients' payment. RESULTS: Results showed that the financial impact of RSA was not significant and patients' access to the new drug greatly improved. CONCLUSION: These results show that RSA is a good system for improving patient access to new drugs without additional expense on insurance.
Budgets ; Humans ; Insurance Carriers ; Insurance* ; Insurance, Health ; National Health Programs*

This study was designed to investigate factors relating to fiscal deficit for regional health insurance. The financial statements for the fiscal year 1990 of nationwide 254 regional medical insurance societies were analyzed. Important findings are summarized below: 1. There were differences in the main reason for the financial deficit among regions when deficit and surplus societies were compared by regions. The total revenue per enrollee, especially revenue from the premium contribution of a deficit society was significantly smaller than that of a surplus society in large cities and counties. On the other hand, the total expenditure per enrollee of a deficit society was larger than that of a surplus society in small cities. 2. Both low premium irate at the beginning of health insurance program and less effort to increase the premium rate were main factors for the smaller revenue from the contribution of a deficit society in large cities and counties. 3. Larger expenditures per covered person of a deficit society in small cities were explained with larger medical expenditures especially for out-patients services rather than larger administrative expenses. 4. A regression analysis showed that utilization rates in out-patient services were significantly associated with income and numbers of total medical care institution per capita within a region where a health insurance society located. Also expenses paid by insurer per visit were associated with the proportion of utilization for tertiary care hospitals as well as the proportion of utilization of public health centers.
Hand ; Health Expenditures ; Humans ; Insurance ; Insurance Carriers ; Insurance, Health* ; Korea* ; Outpatients ; Public Health ; Tertiary Healthcare

This paper tested by using Micro TSP, an empirical econometric analysis to approve officially a hypothesis of price elasticity of the demand for medical care services in Korean national medical insurance and the economic effect of health care delivery system with time-series datas of Medical Insurance statistical yearbook(1981-1993). The results suggest that the korean medical insurance system shows moral hazard due to the change of coinsurance and the economic effect according to intervention of the health care delivery system, but it is different by insurers regardless of the same structure of the medical insurance scheme.
Deductibles and Coinsurance ; Delivery of Health Care ; Elasticity* ; Insurance ; Insurance Carriers ; National Health Programs*

This study was conducted to examine the determinant factors for expenditure of the medical insurance program for self-employeds based on the analysis of 1991 "The Medical Insurance program for self-Employeds Statical Yearbook", and also similar yearbooks in the metropolitan and other provinces. The major findings are as follows: We have divided benefits into these four components such as the utilization rate for out-patients. expenses per claim for out-patients as paid by the insurer, utilization rate for in-patients, and the expenses per claim for in-patients as paid by the insurer, in order to examine the determinant factors for it. The results of the study revealed the following findings: in urban areas, the supply of medical care had more influence on the benefits than other demographic and economic variables, while, in county areas, both the supply of medical care and the rate of those aged over 65 affected the provision of benefits. The determinant factors for financial balance of the medical insurance program for self-employeds are: first, the determinant factor for administrative expenses was the number of households. The more the number of household, the less the administrative expenses per the insured. This shows that the economy of scale is being. And so, the administrative district must be taken into consideration in the incorporation of small regional medical societies and should be re-organized for more efficient management. Second. in urban areas. the supply of medical care had more influence on utilization rate and expenses per claim as paid by insurer, and therefore it is necessary to control it. In county areas the supply of medical care and the rate of those aged over 65 raised the utilization rate and expenses per claim as paid by insurer. For the financial stability of county areas. a common fund for medical care for the aged and expansion of finance stabilization fund would be necessary. But, in county areas, it would be unnecessary to control the supply of medical care because it was much more insufficient than in urban areas. The vitalization of public health facilities must be carried out in county areas, for they reduced benefits. Since the more insured in a single household, the less the utilization of the medical insurance program, benefits for habilitation at home should be given consideration. The law of majority and the economy of scale were applied here, and therefore the incorporation of regional medical societies must be taken into consideration. In integrating regional medical societies, it would be absolutely necessary to review the structural differences among all regional medical societies, the medical demand of each region, and also the local characteristics of each region.
Family Characteristics ; Financial Management ; Health Expenditures* ; Humans ; Insurance Carriers ; Insurance* ; Jurisprudence ; Outpatients ; Public Health ; Rehabilitation ; Societies, Medical

With expanded and extended coverage of the national medical insurance and fast growing health care expenditures, appropriateness of health service utilization and quality of care are concerns of both health care providers and insurers as well as patients. An accurate patient classification system is a basic tool for effective health care policies and efficient health services management. A classification system applicable to Korean medical information-Korean Diagnosis Related Groups (K-DRGs)-was developed based on the U. S. Refined DRGs, and the performance of the developed system was assessed in this study. In the process of the development, first the Korean coding systems for diagnoses and procedures were converted to the systems used in the definition of the U. S. Refined DRGs using the mapping tables formulated by physician panels. Then physician panels reviewed the group definition, and identified medical practice patterns different in two countries. The definition was modified for the difference in K-DRGs. The process resulted in 1,199 groups in the system. Several groups in Refined DRGs could not be differentiated in K-DRGs due to insufficient medical information, and several groups could not be defined due to procedures which were not practiced in Korea. However, the classification structure of Refined DRGs was retained in K-DRGs. The developed system was evaluated for its performance in explaining variations in resource use as measured by charges and length of stay(LOS), for both all and non-extreme discharges. The data base used in this evaluation included 373,322 discharges which was a random sample of discharges reviewed ad payed by the medical insurance during the five-month period from September 1990. The proportion of variance in resource use which was reduced by classifying patients into K-DRGs-r-square-was comparable to the performance of the U. S. Refined DRGs: .39 for charges and .25 for LOS for all discharges, and .53 for charges and .31 for LOS for non-extreme discharges. Another measure analyzed to assess the performance was the coefficient of variation of charges within individual K-DRGs. A total of 966 K-DRGs (87.7%) showed a coefficient below 100%, and the highest coefficient among K-DRGs with more than 30 discharges was 159%.
Classification ; Clinical Coding ; Delivery of Health Care ; Diagnosis* ; Diagnosis-Related Groups* ; Health Expenditures ; Health Personnel ; Health Services ; Humans ; Inpatients* ; Insurance ; Insurance Carriers ; Korea

OBJECTIVE: To quantify the economic value of the Sirolimus Eluting Stent (CYPHER(TM)) in treating acute coronary heart disease (CHD), and to assist in determining an adequate level of reimbursement for CYPHER(TM) in Korea. METHODS: A decision-analytical model, developed by the Belgium Health Economics Disease Management group, was used to investigate the incremental cost-effectiveness of CYPHER(TM) versus conventional stenting. The time horizon was five years. The probabilities for clinical events at each node of the decision model were obtained from the results of large, randomized, controlled clinical trials. The initial care and follow-up direct medical costs were analyzed. The initial costs consisted of those for the initial procedure and hospitalization. The follow-up costs included those for routine follow-up treatments, adverse reactions, revascularization and death. Depending on the perspective of the analysis, the costs were defined as insurance covered or total medical costs (=sum of insurance covered and uncovered medical costs). The cost data were obtained from the administrative data of 449 patients that received conventional stenting from five participating Korean hospitals during June 2002. Sensitivity analyses were performed for discount rates of 3, 5 and 7%. Since the major clinical advantage of CYPHER(TM) over conventional stenting was the reduction in the revascularization rates, the economic value of CYPHER(TM), in relation to the direct medical costs of revascularization, were evaluated. If the incremental cost of CYPHER(TM) per revascularization avoided, compared to conventional stenting, was no higher than that of a revascularization itself, CYPHER(TM) would be considered as being cost-effective. Therefore, the maximum acceptable level for the reimbursement price of CYPHER(TM) making the incremental cost-effectiveness ratio equal to the cost of a revascularization was identified. RESULTS: The average weighted initial insurance covered and total medical costs of conventional stenting were about 6, 275, 000 and 8, 058, 000 Won, respectively. The average weighted sum of the initial and 5-year follow-up insurance covered and total medical costs of conventional stenting were about 13, 659, 000 and 17, 353, 000 Won, respectively. The estimated maximum level of reimbursement price of CYPHER(TM) from the perspectives of the insurer and society were 4, 126, 897 ~ 4, 325, 161 and 4, 939, 939 ~ 5, 078, 781 Won, respectively. CONCLUSION: By evaluating the economic value of CYPHER(TM), as an alternative to conventional stenting, the results of this study are expected to provide a scientific basis for determining the acceptable level of reimbursement for CYPHER(TM).
Belgium ; Coronary Disease* ; Cost-Benefit Analysis ; Decision Support Techniques ; Disease Management ; Follow-Up Studies ; Hospitalization ; Humans ; Insurance ; Insurance Carriers ; Korea ; Sirolimus* ; Stents*

OBJECTIVES: To explore classification rules based on data mining methodologies which are to be used in defining strata in stratified sampling of healthcare providers with improved sampling efficiency. METHODS: We performed k-means clustering to group providers with similar characteristics, then, constructed decision trees on cluster labels to generate stratification rules. We assessed the variance explained by the stratification proposed in this study and by conventional stratification to evaluate the performance of the sampling design. We constructed a study database from health insurance claims data and providers' profile data made available to this study by the Health Insurance Review and Assessment Service of South Korea, and population data from Statistics Korea. From our database, we used the data for single specialty clinics or hospitals in two specialties, general surgery and ophthalmology, for the year 2011 in this study. RESULTS: Data mining resulted in five strata in general surgery with two stratification variables, the number of inpatients per specialist and population density of provider location, and five strata in ophthalmology with two stratification variables, the number of inpatients per specialist and number of beds. The percentages of variance in annual changes in the productivity of specialists explained by the stratification in general surgery and ophthalmology were 22% and 8%, respectively, whereas conventional stratification by the type of provider location and number of beds explained 2% and 0.2% of variance, respectively. CONCLUSIONS: This study demonstrated that data mining methods can be used in designing efficient stratified sampling with variables readily available to the insurer and government; it offers an alternative to the existing stratification method that is widely used in healthcare provider surveys in South Korea.
Data Mining ; Decision Trees ; Efficiency ; Health Personnel ; Humans ; Inpatients ; Insurance Carriers ; Insurance, Health ; Korea ; Ophthalmology ; Population Density ; Republic of Korea ; Sampling Studies ; Specialization

This study was undertaken in order to estimate the accuracy of disease code of the Korean National Medical Insurance Data and disease the characteristics related to the accuracy. To accomplish these objectives, 2,431 cases coded as notifiable acute communicable diseases (NACD) were randomly selected from 1994 National Medical Insurance data file and family medicine specialists reviewed the medical records to confirm the diagnostic accuracy and investigate the related factors. Major findings obtained from this study are as follows: 1. The accuracy rate of disease code of NACD in National Medical Insurance data was very low, 10.1% (95% C.I.: 8.8-11.4). 2. The reasons of inaccuracy in disease code were 1) claiming process related administrative error by physician and non-physician personnel in medical institutions (47.0%), 2) input error of claims data by key punchers of National Medical Insurer (31.3%) and 3) diagnostic error by physicians (21.7%). 3. Characteristics significantly related with lowering the accuracy of disease code were location and level of the medical institutions in multiple logistic regression analysis. Medical institutions in Seoul showed lower accuracy than those in Kyonngi, and so did general hospitals, hospitals and clinics than tertiary hospitals. Physician related characteristics significantly lowering disease code accuracy of insurance data were sex, age group and specialty. Male physicians showed significantly lower accuracy than female physicians; thirties and forties age group also showed significantly lower accuracy than twenties, and so did general physicians and other specialists than internal medicine/pediatric specialists. This study strongly suggests that a series of policies like 1) establishment of peer review organization of National Medical Insurance data, 2) prompt nation-wide expansion of computerized claiming network of National Medical Insurance and 3) establishment and distribution of objective diagnostic criteria to physicians are necessary to set up a national disease surveillance system utilizing National Medical Insurance claims data.
Information Storage and Retrieval ; Communicable Diseases ; Diagnostic Errors ; Female ; Hospitals, General ; Humans ; Insurance Carriers ; Insurance* ; Logistic Models ; Male ; Medical Records ; Professional Review Organizations ; Seoul ; Specialization ; Tertiary Care Centers

BACKGROUND: The voluntary diagnosis-related groups (DRG)-based payment system was introduced in 2002 and the government mandated participation in the DRG for all hospitals from July 2013. The main purpose of this study is to examine the independent effect of mandatory participation in DRG on various outcomes of patients. METHODS: This study collected 1,809,948 inpatient DRG data from the Health Insurance Review and Assessment database which contains medical information for all patients for the period 2007 to 2014 and examined patient outcomes such as length of stay (LOS), total medical cost, spillover, and readmission rate according to hospital size. RESULTS: LOS of patients decreased after DRGs (large hospitals: adjusted odds ratio [aOR], 0.87; 95% confidence interval [CI], 0.78-0.97; small hospitals: aOR, 0.91; 95% CI, 0.91-0.92). The total medical cost of patients increased after DRGs (large hospitals: aOR, 1.22; 95% CI, 1.14-1.30; small hospitals: aOR, 1.22; 95% CI, 1.21-1.23). The results reveals that spillover of patients increased after DRGs (large hospitals: aOR, 1.27; 95% CI, 0.70-2.33; small hospitals: aOR, 1.18; 95% CI, 1.16-1.20). Finally, we found that readmission rates of patients decreased significantly after DRGs (large hospitals: aOR, 0.28; 95% CI, 0.26-0.29; small hospitals: aOR, 0.59; 95% CI, 0.56-0.63). CONCLUSION: The DRG payment system compared to fee-for-service payment in South Korea may be an alternative medical price policy which can reduce the LOS. However, government need to monitor inappropriate changes such as spillover increase. Since this study also is the results based on relatively simple surgery, insurer needs to compare or review bundled payment like new DRG for expansion of various inpatient-related diseases including internal medicine.
Diagnosis-Related Groups* ; Health Facility Size ; Humans ; Inpatients ; Insurance Carriers ; Insurance, Health ; Internal Medicine ; Korea ; Length of Stay ; Odds Ratio ; Patient Readmission