During open enrollment, starting Nov. 1, residents can access affordable Ambetter from Sunflower Health Plan plans in 91 counties. Â Accessibility StatementSkip Navigation LENEXA, Kan., Nov. 3, 2025 /PRNewswire/ -- For more than seven years, Ambetter from Sunflower Health Plan has helped Kansans access affordable, reliable health coverage tailored to their unique needs. As open enrollment begins for 2026, Ambetter from Sunflower Health Plan continues to provide flexible plan options and member-focused benef ...