The purpose of this study is to monitor ongoing safety in subjects with ulcerative colitis (UC) and Crohn's disease (CD) and to provide access to vedolizumab for qualifying subjects who, in the opinion of the investigator, continue to derive benefit from vedolizumab and for whom continued treatment with vedolizumab is desired because there is no other comparable product available or the subject may be expected to develop worsening of disease if they were to modify treatment.