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Gulf War PresumptiveGulf War Presumptive

Functional Gastrointestinal Disorders (IBS, Functional Dyspepsia)

Typical VA Rating Range
10–30%
Actual ratings are assigned by VA raters based on C&P exam findings. This range reflects typical outcomes for veterans with this condition.

About This Condition

Chronic disorders of the gastrointestinal tract — including irritable bowel syndrome (IBS), functional dyspepsia, and related conditions — characterized by recurring symptoms without a structural or biochemical cause. These conditions are extremely common among Gulf War and post-9/11 veterans and are recognized as Gulf War presumptive conditions, meaning VA presumes service connection without requiring proof of a specific cause.

Evidence Needed

  • Gastroenterologist evaluation confirming functional GI disorder
  • Colonoscopy/endoscopy ruling out structural causes
  • Documentation of symptom pattern and frequency
  • Documentation of qualifying Gulf War or post-9/11 service

ICD-10 Codes

K58.9K58.0K30K59.9

These ICD-10 codes should appear in your medical records and VA examination reports. Your physician and VA rater will use these codes to document the condition.

Next Step

Think this condition applies to you? Check your full PACT Act eligibility — we'll assess your service history, deployment locations, and all applicable conditions.

Published by the Honest MOS Editorial DeskVerified against DoD/.gov sourcesUpdated May 2026Editorial standards