Proses perhitungan data pasien masih dilaksanakan secara manual. Saat ini proses penyuluhan yang dilakukan Puskesmas Kesatria hanya berdasarkan aturan yang dikeluarkan oleh Kementrian Kesehatan, bukan berdasarkan penyakit yang di derita oleh pasien di Puskesmas kesatria. Karena jika penyuluhan lebih banyak dari sebelumnya, dan penyakit yang di tangani puskesmas banyak, dan jumlah pasien yang di tangani oleh puskesmas setiap hari semakin banyak, maka sulit menentukan penyakit mana yang akan di lakukan oleh Puskesmas Kesatria. Proses perhitungan data pasien yang masih manual seperti perhitungan penyakit yang dapat di tangani oleh puskesmas, perhitungan penyuluhan, dan perhitungan jumlah penyakit pasien di Puskesmas Kesatria di ubah menjadi menggunakan metode K-Means. Aplikasi Pengelolah Data Pasien Puskesmas Kesatria dengan menggunakan metode waterfall. sebagai sistem pengembangan perangkat lunak. Pengumpulan data dilakukan dengan cara observasi, wawancara, kuesioner dan studi literatur. Pada proses perhitungan data digunakan metode K-Means untuk menentukan penyakit tertinggi di Puskesmas Kesatria. Hasil Hasil penelitian menyebutkan bahwa Aplikasi Pengelolah Data Pasien Puskesmas Kesatria dapat membantu puskesmas dalam menentukan penyuluhan yang akan dilakukan kepada masyarakat.

The process of calculating patient data is still carried out manually. At present the counseling process carried out by the Kesatria Community Health Center is only based on the rules issued by the Ministry of Health, not based on the illness suffered by patients in the Knights Health Center. Because if the counseling is more than before, and the disease handled by the puskesmas is high, and the number of patients handled by the puskesmas is increasing every day, it is difficult to determine which disease will be performed by the Knights Health Center. The process of calculating patient data that is still manual, such as the calculation of diseases that can be handled by the puskesmas, the calculation of counseling, and the calculation of the number of patient diseases in the Kesatria Health Center is changed to use the K-Means method. Patient Data Processing Application for Knights Health Center by using the waterfall method. as a software development system. Data collection was done by observation, interviews, questionnaires and literature studies. In the data calculation process, the K-Means method is used to determine the highest disease in the Knights Health Center. Results The results of the study stated that the Patient Data Management Application of the Kesatria Health Center could assist the Puskesmas in determining the counseling that would be carried out to the community.