Lutheran theology recognizes that Mark 16:9-20 is not found in the oldest Greek manuscripts and was likely added later, but the longer ending has been included in the biblical canon as received by the church. Lutheran Bibles typically include Mark 16:9-20 with a textual note indicating its manuscript status. Luther himself accepted the longer ending and used it in his theological teaching, though he was aware of textual questions.

Lutheran tradition receives the longer ending as authentic Scripture for the church's use, even if its original authorship is questioned. The passage's content (the Great Commission, signs and wonders) is congruent with other biblical teaching. LCMS and Lutheran churches include Mark 16:9-20 in their Bibles as canonical Scripture.