On November 1, 2022, the Centers for Medicare & Medicaid Services (CMS) issued final rules concerning the 2023 Hospital Outpatient Prospective Payment System (OPPS) payment rates and 2023 Medicare Physician Fee Schedule (PFS). These final rules implement various updates and policy changes for Medicare payments under the PFS and OPPS, and made significant updates to the Medicare Shared Savings Program (MSSP), which go into effect on or after January 1, 2023. We summarize the key changes below and will elaborate on these rules in future posts.