LANSING (AP) - Michigan Attorney General Bill Schuette says his office is reviewing Blue Cross Blue Shield of Michigan’s plans for a joint venture involving a Medicaid coverage company.

The Detroit-based Blue Cross and Philadelphia-based Independence Blue Cross are purchasing AmeriHealth Mercy, which has Medicaid managed-care contracts in states including Pennsylvania, Indiana, and South Carolina.

Schuette said Friday he wants the Michigan-based Blue Cross to provide his office with documentation related to the transaction.

Blue Cross officials said they welcome the inquiry and will work with him to clarify questions about the transaction.

The joint venture could provide an opportunity for Blues insurers nationwide to expand into Medicaid coverage just as states are seeking ways to save money in the program and the ranks of Medicaid enrollees is poised to grow.

Copyright 2011 by The Associated Press.  All Rights Reserved.