In December 2021, Governor Baker signed Chapter 102 of the Acts of 2021 into law. This legislation, often referred to as the “ARPA bill,” appropriates close to $4 billion, including $2.55 billion in funding directly from the federal American Rescue Plan Act (ARPA). ARPA was passed in March 2021 to provide money to states to start recovering from the effects of the COVID-19 pandemic. Chapter 102 invests money from ARPA in many areas, including housing, infrastructure, education, and economic development. Health services received $950 million in the law, with funding for physical health, behavioral health, long-term care services, and public health initiatives. This issue brief summarizes the key components of Chapter 102 that will affect health and health care in Massachusetts.