How does HRSA define and audit mixed-use areas for 340B inventory compliance?

HRSA defines a mixed-use area as any location where both 340B-eligible and non‑eligible drugs are dispensed, requiring a verifiable separation of inventory. Auditors expect a one‑to‑one link between each eligible dispense and its 340B purchase order, supported by continuous, auditable tracking records that prove compliance and prevent diversion.