A Study to Evaluate the Efficacy, Safety, and Drug Levels of Oral Ozanimod in Pediatric Participants With Moderately to Severely Active Crohn's Disease With an Inadequate Response to Conventional Therapy

Open to people ages 2-17

• Participants must have a Pediatric Crohn's Disease Activity Index (PCDAI) score ≥ 30 and a Simple Endoscopic Score for Crohn's Disease (SES-CD) score ≥ 6 (or SES-CD ≥ 4 in participants with isolated ileal disease)

• Participant has an inadequate response, intolerance, or loss of response to at least 1 of the following treatments for Crohn's Disease (CD):

  i) corticosteroids ii) immunomodulators iii) biologic therapy iv) other systemic immunomodulatory therapies for CD

• Participant is likely to require, in the physician's judgment, bowel resection within 12 weeks of entry into the study
• Participant has current stoma, ileal-anal pouch anastomosis, fistula that is likely to require, in the physician's judgment, surgical or medical intervention within 12 weeks of entry into the study or need for ileostomy or colostomy

• Participant has extensive small bowel resection (> 100 cm) or known diagnosis of short bowel syndrome or participant requires total parenteral nutrition

  Other protocol-defined inclusion/exclusion criteria apply.