How is HRSA enforcing 340B duplicate discount rules for Medicaid MCO claims in 2026?

In 2026, HRSA is targeting errors where 340B hospitals misidentify Medicaid managed care (MCO) claims as fee‑for‑service (FFS), creating duplicate discounts. Auditors now cross‑check NPIs and state encounter data to flag mismatched carve‑in claims, requiring hospitals to validate 340B identifiers with PBMs and reverse any overlapping transactions.