Veterinary clinic management ER diagram models the complete patient-to-billing workflow with Owner, Pet, Veterinarian, Appointment, Treatment, and Invoice entities. Data flows from Owner through Pet to Appointment, where Veterinarian assigns Treatment and generates Invoice records. This schema enforces referential integrity across patient records, clinical encounters, and financial transactions—essential for HIPAA-adjacent compliance and operational auditing. Fork and customize this diagram on Diagrams.so to match your clinic's specific workflows, add new entities like MedicalHistory or Prescription, or export as .drawio to integrate with your database design tools. The microchip_number field enables pet identification across multiple visits, while the status field on Appointment supports scheduling workflows.