"Consider that the Medicare Payment Advisory Commission reported in 2008 that 28% of Medicare beneficiaries looking for a primary care physician had trouble finding one, up from 24% the year before. The reasons are clear: A 2008 survey by the Texas Medical Association, for example, found that only 38% of primary-care doctors in Texas took new Medicare patients"...
"The problem is even worse with Medicaid. A 2005 Community Tracking Physician survey showed that only 50% of physicians accept this insurance."