There’s No Opting Out of This One: ASM Enters Year One in 2027 

Medicare's first mandatory specialist accountability model, the Ambulatory Specialty Model (ASM), takes effect January 1, 2027, targeting cardiologists and spine/pain specialists in roughly 25% of U.S. metro areas. Unlike voluntary value-based initiatives, ASM has no opt-out or hardship exemption. Participating clinicians face payment adjustments from -9% to +9% in Year One, based on quality, cost, care improvement activities, and interoperability metrics. The CY 2027 proposed rule represents the final opportunity to shape operational details before go-live. Affected practices must act now to confirm participant status, build care coordination infrastructure, and prepare for performance scoring that begins January 1, 2027.