The Health Policy Commission (HPC) announced this week that it will not proceed with a Cost and Market Impact Review of a proposed affiliation between Boston Children’s Hospital, Mount Auburn Hospital, and Mount Auburn Cambridge Independent Practice Association (MACIPA), which has 400 physicians. According to the HPC, under the affiliation, “Children's would become the preferred pediatric academic medical center for MACIPA patients and Children's would provide a discount on certain services provided to MACIPA risk members. MACIPA has stated that it will share any funds received as a result of that arrangement with payers pursuant to the terms of their respective risk-sharing agreements.”