No, there is no need. Like most Christian churches, Lutherans recognize that Baptism is not a denominational thing. Anyone baptized with water in the name of the Father, Son and Holy Spirit is, as far as we are concerned, a baptized child of God, whether that baptism took place in a Lutheran, Catholic, Presbyterian, Baptist or other church, and whether it was by “sprinkling,” “pouring” or “immersion”—the method doesn’t matter to us!