Social Security will put a case on medical hold when they have information showing that your impairment is not yet stable and the expected change in your impairment might affect our determination or decision. In these situations, a Medical Hold is needed to gather more medical information to properly evaluate the severity and duration of your impairment during a stable period. Examples of when a Medical Hold is used: If you have had a recent acute event such as a myocardial infarction (heart attack); if you have recently had a corrective procedure; or if you have started new drug therapy and your response to this treatment has not yet been established.