The medical source may have prescribed treatment at any time, even in the distant
                  past. However, you evaluate whether the individual failed to follow the prescribed
                  treatment only during the relevant claim period from the earliest of the alleged onset
                  date, potential onset date, or established onset date. If the prescribed treatment
                  is not relevant to the adjudicative period in the claim, do not make an FTFPT determination.
                  Do not consider whether the individual failed to follow prescribed treatment prior
                  to the first possible date of entitlement.
               
               EXAMPLE: On August 2, 2018, an individual files for disability benefits based on an impairment
                  related to a lower-extremity amputation. The individual is no longer wearing prostheses
                  that their medical source prescribed in 2016. You determine that the individual meets
                  all of the other criteria for disability. Even though the individual’s own medical
                  source prescribed the treatment in the past, and the individual may no longer see
                  the medical source who prescribed the prosthesis, it meets condition 2.