On November 2, 2023, the Centers for Medicare & Medicaid Services (CMS) released its final rules for the Physician Fee Schedule (PFS) and Outpatient Prospective Payment System (OPPS) for Calendar Year 2024. The new guidelines bring significant updates to substance use disorder (SUD) treatment, focusing on expanding access to services, addressing reimbursement rates, and incorporating new billing codes. These changes aim to improve the quality of care for Medicare beneficiaries with substance use disorders and address the ongoing opioid and mental health crises in the U.S. Let’s have a look at the latest CMS guidelines for SUD billing: