The Centers for Medicare and Medicaid Services says it will cover screening and counseling for obesity as a free preventive service for Medicare beneficiaries. M. Spencer Green/AP hide caption

itoggle caption M. Spencer Green/AP

The scarcity of ADHD medications is a problem faced by an untold number of children and adults with the disorder. GoodMood Enterprises/iStockphoto hide caption

itoggle caption GoodMood Enterprises/iStockphoto

At a Republican presidential debate in Las Vegas last month, Newt Gingrich got zinged by rival Mitt Romney for coming up with idea of an individual insurance mandate. Ethan Miller/Getty Images hide caption

itoggle caption Ethan Miller/Getty Images

Republican presidential candidate Gov. Rick Perry of Texas prepares to speak at a dinner in Bettendorf, Iowa, Monday. Two years ago Perry signed into Texas law an insurance mandate covering controversial tests for heart disease. Charlie Neibergall/AP hide caption

itoggle caption Charlie Neibergall/AP

Wal-Mart's Dr. John Agwunobi (left) said in a statement that the company won't be "building a national, integrated, low-cost primary care health care platform." Even so, the leaves plenty of room for the retailer to pursue an expansion of health care services at its stores. Cliff Owen/AP hide caption

itoggle caption Cliff Owen/AP