How the Board ruled on irritable bowel syndrome (IBS) claims, 2021–2025

Irritable bowel syndrome (IBS) (direct service connection)

Direct (began in or was caused by service), or theory not stated in the Board order

58.7% granted of 589 decided cases (margin of error 54.7–62.7%). 346 granted, 243 denied, 503 sent back to VA (remanded, not decided), 159 dismissed.

What convinced the Board in granted cases

• Most grants rested on the Gulf War presumption: IBS counted as a medically unexplained chronic multi-symptom illness, so no medical nexus opinion was needed. (7 of 11 decisions read; e.g. A24017691, 24005905, 21030712)
• Credible, consistent statements that stomach and bowel symptoms began in service and continued afterward supported grants, even when service records were missing. (6 of 11 decisions read; e.g. A21017494, A23020754, A24027498)
• A treating provider's opinion based on an accurate history was found probative, and VA opinions addressing only a secondary theory did not defeat a direct claim. (2 of 11 decisions read, few decisions; e.g. A23020754, A21017494)

Common reasons in denied cases

• Most denials found no current IBS diagnosis during the claim period, and no undiagnosed illness with objective signs. (10 of 13 decisions read; e.g. A24068544, A23022118, A24049347)
• No competent medical opinion linked IBS to service; the veteran's own belief or a general statement of a link was not enough. (3 of 13 decisions read; e.g. 22019228, A23022671, A24001592)
• Accounts of in-service symptoms were not credible against the records, or service records showed only short-lived gastroenteritis that was treated. (2 of 13 decisions read, few decisions; e.g. A24001592, 22019228)

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Irritable bowel syndrome (IBS) secondary to any service-connected condition

Secondary (caused or worsened by a service-connected condition)

54.2% granted of 59 decided cases (margin of error 41.7–66.3%). 32 granted, 27 denied, 94 sent back to VA (remanded, not decided), 5 dismissed.

What convinced the Board in granted cases

• The Board granted when a private or treating provider's opinion, often citing literature on stress and PTSD affecting the gut, was found more probative than the VA opinion. (7 of 13 decisions read; e.g. A24007802, A25028989, A24027140)
• Negative VA opinions lost weight when they were conclusory, did not address aggravation, ignored the veteran's account that stress triggered symptoms, or wrongly said there was no IBS diagnosis. (7 of 13 decisions read; e.g. A24027140, A24065676, A25028989)
• The veteran's credible, consistent reports linking flare-ups to the service-connected condition helped, as did VA examiners' own favorable opinions, such as IBS from medication or gallbladder removal. (5 of 13 decisions read; e.g. A25011152, A25005102, 21071665)

Common reasons in denied cases

• Most denials happened because there was no current IBS diagnosis; examiners found the symptoms did not fit IBS or were explained by another condition. (9 of 12 decisions read; e.g. A21010754, 21058310, 24027032)
• A well-reasoned VA opinion went unrebutted, for example finding the IBS began before the service-connected condition or was not worsened by it, and no contrary medical opinion was submitted. (5 of 12 decisions read; e.g. 22017363, A24012804, A25020371)
• The veteran's own belief that he or she had IBS, or about its cause, was not competent medical evidence, because diagnosing IBS is medically complex. (5 of 12 decisions read; e.g. A25029450, 21058310, A21010754)

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Irritable bowel syndrome (IBS) secondary to PTSD

Secondary (caused or worsened by a service-connected condition)

Small sample: 22 decided cases, too few for a reliable percentage. 12 granted, 10 denied, 29 sent back to VA (remanded, not decided), 4 dismissed.

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Irritable bowel syndrome (IBS) secondary to depression / psychiatric disorder

Secondary (caused or worsened by a service-connected condition)

Small sample: 11 decided cases, too few for a reliable percentage. 9 granted, 2 denied, 26 sent back to VA (remanded, not decided), 0 dismissed.

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