Early on in her career, Meredith A. Duncan defended medical providers from all sorts of injury and medical-malpractice lawsuits.These days, the 39-year-old Polsinelli LLP partner is working with providers as they navigate state and federal regulations.She focuses her practice on facilities that provide long-term care and housing to seniors and the developmentally disabled.Though she’s not a lobbyist herself, Duncan works with lobbying groups who advocate on behalf of long-term care providers. Her work occasionally …