This is possible since BCBS has a large nationwide network so mutual arrangements can be worked out, although this entails additional fees. But this depends entirely on the application made by the company for their employees' Blue Cross Blue Shield of MA health insurance. Take note that this leeway is provided only for large companies with multiple sites. You could check out the company insurance's policy benefits highlights or SPD (Summary Plan Description) to confirm this. — May 22, 2009 @ 11:12 am