Once again, Massachusetts is providing a testing ground for national healthcare policy. While the U.S. Congress is only beginning a debate about regulating and capping insurance premium increases, the Massachusetts government has already denied proposed rate hikes, and insurers' reactions in the state may foreshadow what's to come at the national level.

First, a caveat: It can be risky to read too much into what happens in Massachusetts. Sometimes the state is a leading indicator of the successes and failures of national healthcare reform (the final legislation took a similar approach, after all). But often what happens in Massachusetts is simply what happens in Massachusetts. It is a unique market with its own strengths and challenges, and every change doesn't necessarily portend how other states will react to similar policy.

But in this case it's easy to connect the dots. In April, the state Division of Insurance refused to allow insurers to raise premiums to their proposed levels in the small-group market. Last week, four major Massachusetts insurers claimed that the decision to cap rate increases led to more than $150 million in first-quarter losses. This week, some of those same insurers are telling hospitals and physicians that they will freeze or slash payments in the upcoming round of contract negotiations.

Continued on HCPro