Inclusion Criteria:  Participants with CPF-CD  CPF-CD that meets one or more of the following criteria:  High inter-sphincteric, high trans-sphincteric, extra-sphincteric or supra-sphincteric fistula, or Presence of greater than or equal to (>=) 2 external openings, or Associated perianal abscess(es)  Physician has made the decision to treat with a specific surgical intervention. Procedures may include:  Fistulotomy, fistula plug, fibrin glue, advancement flap (AF), ligation of inter-sphincteric fistula tract (LIFT), flap repair, fistulectomy, proctectomy, stem cell therapy, other; and seton for palliative purposes.  Participants with CD-RVF: Rectovaginal fistula per physician diagnosis  1. Physician has made the decision to treat with a specific surgical intervention. Procedures may include:  Fistulotomy, fistula plug, fibrin glue, AF, LIFT, flap repair, fistulectomy, proctectomy, stem cell therapy, gracilis muscle interposition/tissue grafts, martius procedure, abdominal procedures, other; and seton use for palliative purposes.  Participants with CCF:  Complex cryptoglandular fistula that meets one or more of the following criteria:  Mid or high trans-sphincteric, or Anterior in women, or Horseshoe fistula  Physician has made the decision to treat with a specific surgical intervention. Procedures may include:  Fistulotomy, fistula plug, fibrin glue, AF, LIFT, flap repair, fistulectomy, proctectomy, stem cell therapy, other; and seton use for palliative purposes  Exclusion Criteria:  Participants who meet any below mentioned criterion among CPF-CD, CD-RVF, and CCF diagnosis will be excluded from the study.  Current participation in interventional clinical trials. Has CPF-CD: fistula connection to bladder or another organ Has CCF: diagnosis of Inflammatory Bowel Disease (IBD), including Ulcerative Colitis, and Crohn's Disease (CD).