Rating for IBS - Couple Questions

You are likely denied because you filed before receiving a formal diagnosis, which fails to establish a current disability as required by 38 CFR 3.159. IBS is rated under Diagnostic Code 7319 (Irritable Bowel Syndrome) via 38 CFR § 4.114. The updated rating criteria, effective August 2023, are: 30% for "moderately severe" cases with frequent episodes of bowel disturbance with abdominal distress, 10% for "moderate" cases with occasional episodes, and 0% for "mild" cases. The key is linking your "mixed IBS" to service; for many veterans, this is achieved through the Gulf War Presumptive provision under 38 CFR § 3.317, which requires a chronic qualifying disability (like IBS) manifesting to a degree of 10% or more within an unspecified time period following relevant service. Since you have a diagnosis now, you must file a supplemental claim with new and relevant evidence, per 38 CFR § 3.2501, which includes your medical records confirming the diagnosis and a strong, detailed personal statement describing symptom frequency, severity, and impact on work and daily life to argue for the appropriate rating level. Consider also a secondary service connection claim if your IBS is aggravated by service-connected medications (see *Allen v. Principi*, 237 F.3d 1368 (Fed. Cir. 2001) on aggravation). **Disclaimer: This is educational information for claims strategy, not legal or medical advice; for personal guidance, consult an accredited VA attorney or claims agent.**