U.S. hospitals participating in 340B program in 2014 by charity care level

* The national average charity care rate for all hospitals is 3.3% of total costs.
In 1992, 340B was envisioned as a small program to address unintended consequences of the 1990 Medicaid drug rebate statute by reinstating deep discounts that pharmaceutical manufacturers had voluntarily provided to certain clinics and true safety net hospitals.