Design of a Mobile-Based General Patient Registration Information System at Tambelang Community Health Center

General patient registration services at Tambelang Community Health Center require integrated data management. This study aims to design, implement, and test a mobile-based general patient registration information system prototype using the Flutter framework, with data storage designed for cloud computing services. A descriptive qualitative approach was used to identify requirements through observation, interviews, documentation, and literature review. System development employed the Waterfall model through six stages: analysis, design, implementation, testing, deployment, and maintenance; operational deployment and maintenance were positioned as subsequent development activities. The study produced a prototype for managing patient, physician, clinic, medication, registration, examination-history, and service-recapitulation data. System modeling included a flowmap, context diagram, Entity Relationship Diagram (ERD), and Data Flow Diagram (DFD), with access rights designed for five roles: Administrator, Patient, Physician, Pharmacy Staff, and Head of the Community Health Center. Black-box testing of three scenarios—registration, storage of medical records and diagnoses together with prescriptions, and presentation of service recapitulation—resulted in a valid status for each scenario. These findings indicate functional conformity within the scenarios tested. Evaluation of service-time efficiency, user acceptance, security, and implementation of all access rights remains necessary in subsequent testing.