HIPAA-Compliant Patient Data Anonymization Pipeline

Design a comprehensive data anonymization workflow that automatically processes patient records from multiple electronic health record (EHR) systems while maintaining strict HIPAA compliance. Create a modular pipeline that can: 1) Detect and mask personally identifiable information (PII), 2) Encrypt sensitive medical identifiers, 3) Generate statistical representations without compromising individual privacy, and 4) Produce audit logs for regulatory compliance. Include error handling for different data formats and demonstrate how the pipeline can integrate with existing healthcare information systems.