In order to improve medical services continually, it is worthwhile to promote a PDCA cycle which they form the improvement plan based on the strategy theme(Plan), carry it out(Do), check the achievement situation(Check), cope with the problems(Action), and step up to the next subject.
 In this research, we propose Maturity Model of Hospital Function(MMHF). In this paper, we especially describe the construction procedure of MMHF. Using MMHF, the administrator of medical facilities can acquire the indicator of the strategy of medical service improvements of self-organization, and can know the achievement degree of improvements.
 MMHF is a new medical valuation modeling using the evaluation criteria used in Japan Council for Quality Health Care, and using the framework of Balance Scored Card(BSC) and Capability Maturity Model Integration(CMMI).

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 Authors have proposed the Maturity Model of Hospital Function(MMHF) as an evaluation model which is needed to measure the promotion situation of the PDCA(Plan, Do, Check, Action) cycle of a medical service.
 Moreover, in MMHF construction process, we completed the table of judgment items of MMHF maturity level. In this paper, we describe the usage of the table. Furthermore, according to the usage, we apply MMHF and verify validity of it.
 Thereby, we verify that MMHF can show the present condition of a candidate hospital in detail, and show clearly the items those should be improved still more preferentially.
 Using MMHF, the indicator of the strategy of the medical service improvement in each institution can be stood, and medical-facilities administrators can know the achievement degree of their improvements.

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 The National Center for Child Health and Development(NCCHD) has developed a long-term follow-up database to utilize the electronic medical records for clinical research and hospital management purposes. In this study, we constructed a trial system to analyze data accumulated in the NCCHD database and conducted a epidemiological study from the perspective of pregnancy weight gain and low birth weight. From sampling data of pregnant women and neonates for the past twenty months, the results are 1) low-birth-weight is significantly related to the insufficient weight gain of pregnant women, 2) 77% of pregnant women do not meet the American Institute of Medicine(IOM) criteria. Electronic data is useful for epidemiological study since it facilitates the collection of detailed patient data for long-term follow-up period and allows labor saving and cost reduction. In the near future, we expect to apply this analysis method to large size data if we can build a shared network system for clinical data around NCCHD.

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 In Japanese hospitals, it is considerable to research sharing clinical data among multiple institutions. But, hospitals may use respectively their own code on database format so it is difficult for sharing and integrating them. So we tried to use a mapping tool(TMS) for disease codes converting the hospital-oriented code to the common code(ICD-10). Then we developed a mock-up system to be referred by common disease code from another institutions in HOSPnet environment. We verified this system between National Center for Child Health and Development(NCCHD) and National Hospital Organization Mie Chuo Medical Center.
 Consequently, we have realized 95% agreement of disease codes between two institutions, on the condition taking of miss-matching codes between hospital-oriented code and the common code. Also, through network connection with HOSPnet, we can research each hospital data to find, refer, collect and analyze. Besides, it is necessary for us to consider miss matching disease codes, mapping rate of the tool itself, security guidelines and data transfer method via secure and effective network.

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