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The health Social Security Administering Agency (BPJS) is a legal entity specifically assigned by the government to administer social security. Seen in the vision and mission of the Long Term Develompment Plan For the Health Sector 2005-2025, namely that the community is expacted to have the ability to access quality health services and also obtain heald insurance, namely that the community gets protection in meeting their basic health needs. Especially for the people of Binjai city, to see the level of satisfaction of peolbe using BPJS Health in the city of Binjai, it is necessary to build a clustering that can group the level of satisfaction in each domicile. Data Mining Grouping using the K-Menas Clustering algoritma metdhod, which is a process of processing quite large amounts of data using statistical methods, this producing a group of data. It is hoped that clustering can complete the grouping of satisfaction levels of BPJS user commuites in the city of Binjai. There are 400 data from correspondent responses from the community regarding the level of satisfaction in using BPJS Health in the city of Binjai. From the results of trials with 400 data carried out with MATLAB, it was found that group 3, cluster 1, had 244 data, cluster 2 had 69 data, cluster 3 had 87 data, group 4 cluster 1 has 78 data, cluster 2 68 data, cluster 3 has 109 data, group 5 cluster 1 has 63 data, cluster 2 has 63 data, cluster 3 has 145 data, cluster 4 has 24 data, cluster 5 has 100 data.

Introduction: The internet provides various conveniences, including in buying and selling transactions or so-called e-commerce. E-commerce provides many benefits, and there were 2,361,423 e-commerce businesses in Indonesia in 2020. E-commerce is a legitimate buying and selling transaction if it does not deviate from the principles of Islamic sharia law. Purpose: To understand the meaning of e-commerce, its development, and the Islamic law perspective on it. Method: The method used is literature study from relevant journals, books, and fatwas. Results and Conclusion: E-commerce is a buying and selling transaction process carried out through the internet. E-commerce has several advantages compared to traditional commerce, such as the buying and selling process can be done anywhere and anytime. E-commerce in Indonesia has developed since 1999 until now, and it has always been accompanied by improvements. The largest e-commerce service providers in Indonesia are Lazada, Tokopedia, Shopee, Elevania, Bukalapak, Blibli, and Matahari Mal.com. E-commerce has been declared legitimate by MUI, NU, and ulama.