Amgen Inc. disclosed a data breach involving its service provider, ZS Associates. An unauthorized party compromised a ZS service account and accessed files related to Amgen patients between April 21, 2021, and May 14, 2021. Amgen was notified on May 27, 2021. Affected data included names, email addresses, city, state, zip code, age, gender, insurance type, and marketing material preferences. No SSNs or financial data were involved. Amgen retained forensic investigators and is offering credit monitoring.