This document provides an overview of pharmaceutical pricing and reimbursement in the United States. It discusses key demographics and economic factors, the major public and private healthcare programs, and how drug pricing and reimbursement works. The US healthcare system is complex, with prescription drugs constituting 12% of total spending. Major public programs include Medicare, Medicaid, and CHIP, while private sources include employer and individual insurance plans. Pharmaceutical companies set prices freely, while payers determine reimbursement levels and use formularies, tiers, and cost-sharing to manage drug costs.