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Data and Statistics

IBD prevalence in the United States

In 2015, an estimated 1.3% of U.S. adults (3 million) reported being diagnosed with IBD (either Crohn’s disease or ulcerative colitis).1 This was a large increase from 1999 (0.9% or 2 million adults).2

Some groups were more likely to report IBD, including those —

  • Aged 45 years or older
  • Hispanic or non-Hispanic white
  • With less than a high school level of education
  • Not currently employed
  • Born in the U.S. (compared with adults born outside the U.S.)
  • Living in poverty
  • Living in suburban areas

This estimate does not include children aged <18 years, who may also have IBD. Most people with IBD are diagnosed in their 20s and 30s.

Based on the National Inpatient Sample data, there was no significant change in the hospitalization rate when Crohn’s disease was the primary diagnosis from 2003 to 2013. The hospitalization rate, however, increased significantly during this period from 44.2 to 59.7 per 100,000 population when it was listed as any secondary diagnosis.3


  1. Dahlhamer JM, Zammitti EP, Ward BW, Wheaton AG, Croft JB. Prevalence of inflammatory bowel disease among adults aged ≥18 years — United States, 2015. MMWR. 2016;65(42):1166-1169. Available at
  2. Nguyen GC, Chong CA, Chong RY. National estimates of the burden of inflammatory bowel disease among racial and ethnic groups in the United States. J Crohns Colitis. 2014;8:288–95.
  3. Malarcher CA, Wheaton AG, Liu Y et al. Hospitalization for Crohn’s Disease — United States, 2003-2013. MMWR. 2017;66(14):377-381. Available at