Formerly known as Shawnee Mission Medical Center Prairie Star Emergency and Lab. Directions to AdventHealth Lenexa 23401 Prairie Star Parkway. Lenexa, KS 66227. Directions to AdventHealth Lenexa. 23401 Prairie Star Parkway. Lenexa, KS 66227. Call AdventHealth Lenexa at. 913-676-8500. Download Contact Card..