Andrea Willis, M.D., chief medical officer of BlueCross BlueShield of Tennessee, writes about the benefits of a patient-centered medical home (PCMH) in a column for The Tennessean. Giving members acess to such progreams will "help provide them with higher-quality care through long-term wellness and a greater ability to participate in their health care decisions," she writes--plus save care costs and reduce readmissions. The insurance company aims to increase the number of certified providers to 50 practices to cover a total of 450,000 of its members under the PCMH model within the next four years. Column