My stoma stitches were never removed, they dissolved on their own. The visit with the surgeon didn't accomplish much for me... I told him my ribs were sore, he told me why they were sore, and not much else. He didn't even ask about my stoma, let alone look at it, and I didn't realize it until I was back home.
Take a change with you because it's better to be safe than sorry but don't be surprised if you don't need it.