TYLER, Texas — Appointment cancellations and financial distress have become a constant at Bethesda Pediatrics, a nonprofit medical clinic in East Texas that is heavily dependent on Medicaid, the health insurance program for the poor. On a recent Monday, the mother of a toddler who had a primary care appointment broke down in tears after learning the child had just lost Medicaid coverage, wondering how she could pay the bill. Another mother told Dr. Danny Price, the clinic’s lead pediatrician, th