Home › Conditions › IBS (Irritable Bowel Syndrome)
Irritable bowel syndrome and other functional digestive disorders — rated by frequency of abdominal pain and bowel-habit changes, and presumptive for Gulf War veterans. This guide quotes the actual rating criteria from 38 CFR Part 4 for diagnostic code 7319, explains what the C&P examiner measures, covers the presumptive and secondary routes to service connection, and lists the reasons these claims come back denied — and how each gets fixed.
How the VA rates ibs (irritable bowel syndrome) in 2026 — the exact criteria
These are the criteria a VA rater applies, quoted from the rating schedule (§ 4.114). Your rating is the highest level whose wording your evidence meets — and evidence that never uses these words tends to be rated at the bottom.
DC 7319 — Irritable bowel syndrome
| Rating | Criteria (38 CFR Part 4 wording) |
|---|---|
| 30% | Abdominal pain related to defecation at least one day per week during the previous three months; and two or more of: change in stool frequency, change in stool form, altered stool passage (straining and/or urgency), mucorrhea, abdominal bloating, or subjective distension |
| 20% | Abdominal pain related to defecation for at least three days per month during the previous three months; and two or more of the same signs |
| 10% | Abdominal pain related to defecation at least once during the previous three months; and two or more of the same signs |
This code also covers functional digestive disorders such as dyspepsia, functional bloating and constipation, and diarrhea — including the Gulf War undiagnosed-illness presumptives of § 3.317.
Honest ceiling: 30% at symptomatic days once a week or more.
What the C&P examiner measures
The examiner records how many days per week or month you have abdominal pain related to bowel movements, and which of the six associated signs (stool frequency, form, straining/urgency, mucus, bloating, distension) apply. A symptom diary for the last three months maps directly onto the criteria.
The questions that get at the rating criteria — answer them for yourself before the exam:
- How many days a month does your stomach change your plans — where you eat, what you eat, whether you leave the house?
- When it hits, is it cramping and straight to the bathroom?
Service connection: presumptive, direct, or secondary
IBS and other functional gastrointestinal disorders are presumptive Gulf War medically unexplained chronic multisymptom illnesses (38 CFR 3.317) for veterans with Southwest Asia service. Otherwise, secondary to PTSD/anxiety is the recognized route.
Every service-connection claim has three legs: a current diagnosis (the C&P exam can supply it), an in-service event, injury, exposure or an already-connected condition, and a link between the two — which the VA's own examiner addresses at the exam for direct and secondary claims, and which the law supplies for presumptive ones. You do not need a private opinion to file; you need one only if the VA denies for lack of nexus, and a supplemental claim within one year keeps your effective date.
Secondary conditions veterans miss
This condition is more often the secondary in a chain than the anchor — see the secondary-claims guides for the recognized pathways.
What the medical literature says
NASEM, Gulf War and Health, Vol. 8 (2010) + 38 CFR 3.317
Functional GI disorders (including IBS) are presumptively linked to Southwest Asia service — no nexus letter needed. Why it matters: Any Gulf-theater vet with IBS: presumptive path.
Thabane M., Marshall J.K. (systematic review/meta-analysis, American Journal of Gastroenterology 2007) — post-infectious IBS
Infectious gastroenteritis substantially raises the risk of developing chronic IBS. Why it matters: IBS after documented deployment GI illness ("everyone got sick over there").
Why ibs (irritable bowel syndrome) claims get denied — and the fix
- Gulf War presumption missed — 3.317 applies to functional GI disorders without a diagnosis of cause.
- Frequency of pain not documented — a three-month diary answers the criteria exactly.
A denial is a grade on the evidence packet, not a verdict on you. Filed as a supplemental claim within one year, the fix keeps your original effective date.
Filing it right the first time
- Intent to File first. It locks your effective date for a year — back pay runs from that day, not from the day the package is ready.
- File everything at once. Every condition with a real symptom and a plausible route — direct, presumptive, secondary, increase — goes in one claim. The VA's duty to assist schedules the exam and pulls your records; a condition held back "for more evidence" only starts its clock later.
- Your statement in the criteria's words. A Statement in Support of Claim (VA Form 21-4138) that describes your worst days and your typical days using the language in the table above is the evidence the rater reads first.
- Your records. VA records through Blue Button, decision letters and code sheet from VA.gov, and private records from each doctor's office or patient portal — or a signed 21-4142 so the VA pulls them.
- Prepare for the exam. Know what the examiner measures (above) and answer honestly, including the bad days.
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See If You Qualify →Frequently asked questions
What is the VA rating for ibs (irritable bowel syndrome)?
IBS (Irritable Bowel Syndrome) is rated under diagnostic code 7319 (§ 4.114) at 10%, 20%, 30%. The percentage depends on which criteria in the rating schedule your evidence meets — the full table is on this page.
What is the highest VA rating for ibs (irritable bowel syndrome)?
The highest schedular rating available is 30%. Typical grants land around 10%, but every case is decided on its own evidence.
Is ibs (irritable bowel syndrome) a presumptive condition?
IBS and other functional gastrointestinal disorders are presumptive Gulf War medically unexplained chronic multisymptom illnesses (38 CFR 3.317) for veterans with Southwest Asia service. Otherwise, secondary to PTSD/anxiety is the recognized route.
Do I need a nexus letter for ibs (irritable bowel syndrome)?
Not to file. The VA's duty to assist schedules a C&P exam where its own examiner addresses the connection, and presumptive conditions need no opinion at all. A private opinion becomes worth buying only if the VA denies for lack of nexus — a supplemental claim within one year keeps your original effective date.
Rating criteria verified against eCFR (38 CFR Part 4) — last reviewed 2026-09-19. Regulations change; confirm anything decision-critical at ecfr.gov.