On Jan. 14, the Centers for Medicare & Medicaid Services (CMS) announced a new policy that could bring greater transparency to Medicare, one of the largest programs in the federal government. CMS revoked its long-standing policy not to release publicly any information about Medicare’s payments to doctors. Under the new policy, the agency will evaluate requests for such information on a case-by-case basis. Although the impact of the change is not yet clear, it creates an opportunity for a welcome step forward for data transparency and open government.