Blue KC is proud to be the largest provider of health insurance plans in a 32-county service area covering greater Kansas City and northwest Missouri. The Missouri counties covered in Blue KC’s service area include: Andrew, Atchison, Bates, Benton, Buchanan, Caldwell, Carroll, Cass, Clay, Clinton, Daviess, DeKalb, Gentry, Grundy, Harrison, Henry, Holt, Jackson, Johnson, Lafayette, Livingston, Mercer, Nodaway, Pettis, Platte, Ray, Saline, St. Clair, Vernon, and Worth. The Kansas counties covered in Blue KC’s service area include Johnson and Wyandotte counties.