Crohn's Disease is rated by the U.S. Department of Veterans Affairs under DC 7326 of 38 CFR § 4.114, DC 7326 (Crohn's / undifferentiated IBD — canonical DC; the former DC 7323 ulcerative colitis framework was consolidated here by § 4.114 amendment) across 4 severity tiers (10% / 30% / 60% / 100%). Service connection requires (1) a current diagnosis, (2) an in-service event, injury, or exposure, and (3) a medical nexus opinion linking the two under 38 C.F.R. § 3.303. This condition is frequently rated as secondary to Fistulas or Kidney Stones under 38 C.F.R. § 3.310.
Chronic inflammatory bowel disease affecting any part of the GI tract, causing transmural inflammation
Rating criteria text quoted verbatim from 38 C.F.R. § 4.114 (Digestive system). Source verified 2026-05-17 by ClaimRecon Editorial Team against the Cornell Law CFR mirror; eCFR.gov is the authoritative government source.