Seems like that should be an easy question with a simple answer doesn't it? But if that were the case you wouldn't be asking on this forum.
Anyway, there is no icd code that contains the description "Verrucous Keratosis" however after researching it I find that most people use 702.19 for verrucous keratosis. They state that the histologic differential diagnosis of seborrheic keratoses includes verruca vulgari. So I would use 702.19.
Michele