People with inflammatory bowel disease, or IBD, commonly experience diarrhea and abdominal pain. These symptoms are often related to inflammation associated with IBD. Sometimes these symptoms are related to both IBD and irritable bowel syndrome, or IBS. IBS is sensitivity of the intestine without inflammation. Patients with IBD who are diagnosed with IBS may experience changes in their care and well-being. We looked at the rate of IBD-IBS diagnosis in the CCFA Partners network. We also looked at how a diagnosis of IBD-IBS impacts outcomes, such as ability to perform normal daily activities, and use of specific medications. A total of 6309 patients were included, of these, 20% reported being diagnosed with IBS after their IBD diagnosis. Patients with both an IBD and IBS diagnosis had higher rates of narcotic use compared to patients with an IBD diagnosis alone. An IBS diagnosis was associated with anxiety, depression, fatigue, poor sleep quality, pain interference, and decreased social satisfaction. Appropriate diagnosis, treatment, and counseling may help improve outcomes experienced by IBD-IBS patients and reduce narcotic use in this group.