Do I need a nexus letter for a IBS claim?

Not always. The strongest claims rely on service treatment records, presumptive rules, or a clear C&P opinion. A nexus letter is most useful when the condition was diagnosed after service, when STRs are silent, or when the VA issued a negative C&P opinion. See our nexus letter anatomy at /nexus-letters for the seven sections a strong opinion includes.

What is the C&P exam for IBS actually scoring?

The Disability Benefits Questionnaire (DBQ) for IBS is the structured form the examiner completes. This page explains the sections of the form and the cited rating criteria in plain English. Describe only facts that are true, including how symptoms vary and affect daily activities or work.

Can I file IBS as a secondary condition?

Yes, if you can show the condition was caused or aggravated by an already service-connected disability. Common secondary patterns are documented at /nexus-letters. The opinion needs to address the specific theory (direct, secondary, or aggravation) and the medical mechanism.

What if my IBS claim is denied?

Three appeal lanes open: Higher-Level Review (no new evidence, senior reviewer takes another look), Supplemental Claim (file new evidence, 1-year clock), or Board Appeal (binding decision by a Veterans Law Judge). Pick based on what you have. See /resources/appeals for the full decision tree.

IBS DBQ Field Guide

Since May 19, 2024, irritable bowel syndrome is evaluated under 38 CFR § 4.114, Diagnostic Code 7319 on frequency, not the old mild / moderate / severe labels. The 0% rung is gone. Every current tier uses the same symptom list. What moves the percentage is how often abdominal pain related to defecation occurred during the previous three months, plus two or more listed associated findings.

The note under DC 7319 says the code may include functional digestive disorders (see 38 CFR § 3.317), such as dyspepsia, functional bloating and constipation, and diarrhea. Other symptoms not covered here are evaluated under a different code, including gastrointestinal dysmotility syndrome (DC 7356), without pyramiding the same manifestation twice (§ 4.14).

What the examiner is filling out

Diagnosis — IBS or a functional digestive disorder mapped to this code.
Abdominal pain related to defecation — how many days in the prior three months.
Associated findings — 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.
Treatment and course — medications, diet, and whether other GI codes apply separately.

The current DC 7319 schedule

10%Abdominal pain related to defecation at least once during the previous three months, plus two or more associated findings

Lowest current schedular tier. The old 0% ‘mild’ rung is not in the current table.

20%Abdominal pain related to defecation for at least three days per month during the previous three months, plus two or more associated findings

Same symptom list as 10% and 30%. Frequency over the three-month window is the difference.

30%Abdominal pain related to defecation at least one day per week during the previous three months, plus two or more associated findings

Maximum schedular rating under DC 7319. There is no 50% or 60% rung on this code.

DC 7319 tops out at 30%. If substantially gainful employment is prevented by service-connected disability, that is a separate TDIU question under 38 CFR § 4.16 for a VSO, not a higher IBS percentage on this table.

Records that map to the current criteria

A dated symptom log covering the last three months — days with abdominal pain related to defecation.
Associated findings written in treating notes: stool frequency or form change, straining, urgency, mucus, bloating, distension.
Pharmacy and diet history — what was tried and whether symptoms continued.
Lay statements that report observed frequency, not a rating percentage.

Describe the full picture accurately

Accuracy reminder

Describe what is true in your own words, including frequency, duration, treatment, good and bad days, and effects on daily activities or work. Do not exaggerate, omit improvement, rehearse a rating tier, or guess. If something varies or you do not know, say that clearly.

Count days. Do not upgrade a few bad days into “constant.” The current table does not use “constant abdominal distress” as the 30% test. That language belonged to the retired ladder.

Secondary research is common

Veterans often research IBS as secondary under 38 CFR § 3.310 (for example alongside a mental-health rating or medication effects). Severity is still the DC 7319 table. A medical-link opinion, if needed, is a treating-clinician and VSO question. They file. We don’t.

Condition guide: diagnostic-code index. Confirm the live text in eCFR § 4.114 before a VSO conversation.

Use this with the rest of the site

▸ condition index condition guide — the rating schedule and evidence checklist for that condition.
▸ C&P Exam Prep — a checklist for organizing your history, treatment, and questions before the exam.
▸ Coach preview — free five-question preview; the dashboard organizes C&P prep and a VSO packet.
▸ Full C&P exam guide — how to describe your symptoms accurately.

Get the free Secondary Conditions Checklist by email

Educational content only. VA publishes Public Disability Benefits Questionnaires. Some DBQs are not available for public use. Rating criteria are in 38 CFR Part 4. Not legal or medical advice. Always consult a VA-accredited VSO or attorney for claim-specific guidance. CFR citations: 38 CFR § 4.114 Diagnostic Code 7319 (IBS, schedule effective May 19, 2024); § 3.317 (functional digestive disorders); § 4.14 (pyramiding); § 4.16 (TDIU); § 3.310 (secondary service connection). Confirm current eCFR wording..