Beginning Jan. 1, 2022, the Centers for Medicare and Medicaid Services (CMS) will enforce new Stark Law 1 requirements for physician compensation models in group practices. Group practices that rely on generating revenues through intra-group referrals of “Designated Health Services” (e.g., clinical laboratory services, therapy services, imaging services, outpatient prescription drugs, durable medical equipment, etc.), including for ancillary services billed under the In-Office Ancillary Services exception, should start planning now to ensure that their compensation plans – specifically, their productivity bonuses and profit-sharing plans – will remain in compliance with the Stark Law. The Stark Law is a strict liability statute, meaning even a technical misstep in a compensation plan can make the group’s Designated Health Services (DHS) non-billable under Medicare. Accordingly, it is important that group practices ensure continued compliance when the 2022 requirements become effective.