Medical appointment system ER diagram modeling patient-doctor scheduling with specialties and appointment states. The schema connects pacientes, medicos, especialidades, and turnos tables through foreign keys, with medico_especialidad enabling many-to-many doctor-specialty relationships and estados_turno tracking appointment status. This normalized design eliminates data redundancy, enforces referential integrity, and supports complex queries across patient records, physician credentials, and appointment workflows. Fork and customize this diagram on Diagrams.so to adapt it for your healthcare platform, add audit fields, or export as .drawio for database documentation.