Final answer:
The healthcare expansion era refers to the period of significant reforms in healthcare policy and access in the United States, particularly with the implementation of the Affordable Care Act (ACA) in 2010.
Step-by-step explanation:
The healthcare expansion era refers to the period of significant reforms in healthcare policy and access in the United States. While the exact timeframe may vary, it generally includes the implementation of the Affordable Care Act (ACA) in 2010. This era entailed expanding healthcare coverage to millions of Americans, requiring individuals to have health insurance, and creating insurance exchanges to offer affordable plans.