Accountable Care Organizations (ACOs) participating in the Medicare Shared Savings Program (MSSP) will be required to report electronic clinical quality measures (eCQMs) or MIPS CQMs beginning in 2025 after the CMS Web Interface sunsets. The shift towards a new reporting method has significant implications for ACOs, so understanding how quality will be reported and assessed is critical. In this article, we will cover what ACOs need to know about the new reporting requirements and why gaining early experience with the measures can lead to better reporting results in the future.