Ulcerative Colitis
Ulcerative Colitis is indexed under Gastrointestinal, Inflammatory Bowel Disease. Also known as UC.
- US prevalence
- ~3.15 million U.S. adults age 18+ (1.2%) had ever been diagnosed with ulcerative colitis in 2023-2024 Source: NCHS Health E-Stat 122 — Inflammatory Bowel Disease Among Adults, 2023-2024. Federal source. Label: VERIFIED.
- ICD-10-CM codes
- K51, K51.9
- Typical onset
- Peak onset 15-30 years; second smaller peak 50-70
- Course
- episodic
- Body systems
- gastrointestinal
- Sex differences
- Roughly equal
- Racial and ethnic differences
- Similar to Crohn's; historically white-predominant, increasing globally
What this page does not establish
These figures describe populations, not individuals, and none of them is a diagnosis or a treatment recommendation. Prevalence estimates are approximate and reflect published ranges. Disparity figures are reported patterns, not causes.
Taxonomy last reviewed 2026-05-19. Each figure on the interactive page carries its own source and retrieval date, which can be later than this review.
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