A chargemaster is a hospital pricing and billing file that maps services, supplies, medications, and procedures to billable entries. It is part of the revenue cycle, helping a facility turn clinical activity into claims, charges, and reimbursement records.
In cyber security, chargemasters matter because integrity is as important as availability. If an attacker or compromised vendor alters pricing tables, code references, or update workflows, the damage may show up as denied claims, incorrect billing, compliance problems, or widespread manual rework. Defenders therefore treat chargemaster files like sensitive business logic: they track change history, restrict who can edit them, verify updates against trusted baselines, and review audit trails after any vendor incident. Even without patient records being exposed, tampering with a chargemaster can disrupt operations and create real financial risk.