HIPAA-Compliant Patient Data Anonymization Pipeline

Design a Python script using pandas and numpy that automatically anonymizes patient medical records while preserving statistical integrity. The script must remove ALL personally identifiable information (PII), replace names with randomized tokens, mask specific medical record numbers, and generate a comprehensive audit log of all transformations. Implement differential privacy techniques to ensure no individual can be re-identified, and create a validation mechanism that checks the anonymization against HIPAA de-identification standards.