A small but growing number of physicians are not accepting government insurance, such as Medicare and Medicaid, and are even refusing to accept patients’ private insurance, according to Dr. Jane Orient, executive director of the American Association of Physicians and Surgeons (AAPS). Orient says the transition to a business model in which patients agree to pay doctors directly for the health care services they provide started before Obamacare was passed, but that the new law has accelerated the trend, especially among AAPS’ 4,000 or so members. AAPS is the conservative alternative to the much larger American Medical Association (AMA), which...