For many consumers, switching health insurance plans has become an unwelcome ritual, akin to filing taxes, that is time-consuming and can entail searching for new doctors and hospitals each year. Gail Galen, 63, is preparing to leap to her third insurer in three years as she braces for another round of shopping on the federal insurance marketplace. “Every year I feel like I’m starting all over again, and I just dread it,” said Galen. “My stress level just shoots up.”