Nationwide yes - The program is commonly referred to as Meaningful Use. There were a number of requirements related to data exchange, and it moved the needle slightly.

All the requirements are written as a numerator/denominator format. For example, 25% of all lab orders placed by a provider need to be resulted electronically. So there's an incentive to integrate some things, but not all.

Edit: here are the 2015 rules and accompanying underlying standards: https://www.healthit.gov/policy-researchers-implementers/201...