IBS Nexus Letters

IBS can be disruptive, unpredictable, and hard to live with.

A physician-written medical opinion explaining how irritable bowel syndrome may be secondary to PTSD, anxiety, depression, or chronic stress.

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What Is IBS

A functional GI disorder with strong ties to the mind-gut axis

Irritable bowel syndrome (IBS) is a chronic condition characterized by abdominal pain, cramping, diarrhea, constipation, or alternating patterns. For veterans, IBS is frequently downstream of chronic stress and mental health conditions — through the well-established gut-brain axis.

Can IBS be secondary to PTSD?

Yes. Peer-reviewed literature repeatedly links PTSD, anxiety, and depression to IBS through altered gut motility, visceral hypersensitivity, and dysregulation of the gut-brain axis.

VA rating tiers

IBS is rated 10%, 20%, or 30% under DC 7319 based on symptom frequency and severity — from mild disturbance to severe symptoms with more or less constant abdominal distress.

What A Nexus Letter Should Address

What Dr. Allen puts in an IBS nexus letter

The current IBS diagnosis and Rome criteria where applied
Whether the pathway is causation or aggravation
The service-connected primary condition being pointed to
Timeline of GI symptoms in relation to the primary condition
Peer-reviewed medical reasoning applied to your specific record

IBS & GERD

Why IBS and GERD deserve separate analysis

GERD and IBS have distinct diagnostic criteria and distinct rating pathways. When the record supports both, they should be claimed as separate conditions. Read about GERD nexus letters →

Considering an IBS secondary claim?

An individualized medical review of what the record actually shows.

Request a Consultation Call (919) 849-8617

Explore more IBS and nexus letter resources

FAQ

Frequently Asked Questions

Can IBS be service-connected as secondary to PTSD?

Yes. Medical literature strongly supports the link between PTSD, chronic stress, and IBS. A well-reasoned nexus letter can explain how the mental health condition caused or aggravated the IBS.

Is IBS presumptive for Gulf War veterans?

Yes. Under 38 CFR 3.317, functional GI conditions including IBS are presumptive for veterans who served in the Southwest Asia theater. Ask whether that pathway applies before pursuing a secondary claim.

How is IBS rated?

10%, 20%, or 30% under DC 7319 depending on severity of abdominal distress and bowel disturbance.

Can I be rated for both GERD and IBS?

Yes, when the medical evidence supports two independent diagnoses with distinct symptom profiles.

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