SSA published SSR 12-2p, “Evaluation of Fibromyalgia” on July 25, 2012. This Social
            Security Ruling (SSR), which took effect upon publication, explains our policies for
            developing evidence to establish that a person has a medically determinable impairment
            (MDI) of fibromyalgia (FM). SSR 12-2p also explains how we evaluate FM in disability
            claims and continuing disability reviews under titles II and XVI of the Social Security
            Act.