Personally, I can’t imagine why anyone is making this distinction. I think of OCD as an industrial-strength anxiety problem. Thought provoking, though. I would only be in favor of changing the classification if it raises awareness and research for treatment options.
Classification of Obsessive-Compulsive Disorder Debatable: “Whether to continue to classify obsessive-compulsive disorder as an anxiety disorder is controversial, according to a review in the Aug. 8 issue of The Lancet. The review notes that biological and behavioral models can explain some aspects of the disorder and have helped to develop treatments.”