Home Privacy & Data Security 294,000 Allegheny Health Network Patients Affected by Business Associate Cyberattack 294,000 Allegheny Health Network Patients Affected by Business Associate Cyberattackadmin Jan 23, 2025 comments offAllegheny Health Network (AHN), a Pittsburgh-based 14-hospital academic medical system, has announced a significant data breach involving unauthorized access to patient data at one of its business associates.