Fewer specialty doctors are accepting children enrolled in Medicaid programs than compared to commercial health plans, according to a new study by the Government Accountability Office (GAO). More than 75 percent of the 932 primary care physicians polled said they had trouble referring children enrolled in Medicaid or the Children's Health Insurance Program (CHIP) to specialists for care. And about 22 percent of all of the nation's physicians do not participate in Medicaid or CHIP, notes the GAO. Report (.pdf)