Final answer:
Hospitals report core measures to the CMS, or the Centers for Medicare & Medicaid Services.
Step-by-step explanation:
Hospitals report core measures to the CMS, or the Centers for Medicare & Medicaid Services. The CMS is a governmental agency within the U.S. Department of Health and Human Services. It is responsible for administering the Medicare and Medicaid programs, as well as overseeing the implementation of various quality and reporting initiatives in healthcare.