Commerce clause
State medical facility licensing statute does not facially violate dormant commerce clause, as there is no demonstrable statistical proof of discrimination in favor of in-state providers.
State of incorporation is a valid, testable criterion.
Bias in favor of incumbent businesses is not a proxy for discrimination against out of state businesses.
Sufficient policy benefits to justify policy in a balancing test against de facto dormant commerce clause challenge.
http://www.ca4.uscourts.gov/Opinions/Published/142283.P.pdf
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.