We require objective medical evidence from an AMS to establish the existence of a
            medically determinable impairment (MDI) at step 2 of the sequential evaluation process.
            Once an MDI is established, we also consider objective medical evidence for all other
            findings in a claim, as appropriate.
         
         For information on establishing an MDI, see DI 22505.003 Evidence from an Acceptable Medical Source (AMS).