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Fibromyalgia, chronic fatigue syndrome and medically unexplained chronic multisymptom illness — the Gulf War presumptives that need no diagnosis of cause. This guide quotes the actual rating criteria from 38 CFR Part 4 for diagnostic code 5025 / 6354 / 8850, 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 fibromyalgia and gulf war illness in 2026 — the exact criteria
These are the criteria a VA rater applies, quoted from the rating schedule (§ 4.71a · § 4.88b). 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 5025 — Fibromyalgia (fibrositis, primary fibromyalgia syndrome)
| Rating | Criteria (38 CFR Part 4 wording) |
|---|---|
| 40% | Widespread musculoskeletal pain and tender points (with or without fatigue, sleep disturbance, stiffness, paresthesias, headache, irritable bowel symptoms, depression, anxiety, or Raynaud's-like symptoms) that are constant, or nearly so, and refractory to therapy |
| 20% | Symptoms that are episodic, with exacerbations often precipitated by environmental or emotional stress or by overexertion, but that are present more than one-third of the time |
| 10% | Symptoms that require continuous medication for control |
Widespread pain means pain in both the left and right sides of the body, above and below the waist, affecting both the axial skeleton and the extremities. Fibromyalgia is a Gulf War presumptive medically unexplained chronic multisymptom illness (38 CFR 3.317) for Southwest Asia service.
DC 6354 — Chronic fatigue syndrome
| Rating | Criteria (38 CFR Part 4 wording) |
|---|---|
| 100% | Debilitating fatigue and cognitive impairments nearly constant and so severe as to restrict routine daily activities almost completely and which may occasionally preclude self-care |
| 60% | Nearly constant and restricting routine daily activities to less than 50 percent of the pre-illness level; or waxing and waning with incapacitation of at least six weeks total per year |
| 40% | Nearly constant and restricting routine daily activities from 50 to 75 percent of the pre-illness level; or incapacitation of at least four but less than six weeks per year |
| 20% | Nearly constant and restricting routine daily activities by less than 25 percent of the pre-illness level; or incapacitation of at least two but less than four weeks per year |
| 10% | Waxing and waning with incapacitation of at least one but less than two weeks per year; or symptoms controlled by continuous medication |
Incapacitation exists only when a licensed physician prescribes bed rest and treatment.
Honest ceiling: 40% — constant widespread pain refractory to therapy.
What the C&P examiner measures
Tender points, widespread pain on both sides and above and below the waist, whether symptoms are constant or episodic and the share of time present, response to therapy, and associated fatigue, sleep, IBS and cognitive symptoms. A daily symptom log covering several months maps onto the criteria.
The questions that get at the rating criteria — answer them for yourself before the exam:
- Where were you deployed — Iraq, Kuwait, Saudi?
- Is it one spot that hurts, or kind of everywhere all the time?
Service connection: presumptive, direct, or secondary
Fibromyalgia, chronic fatigue syndrome and functional GI disorders are presumptive medically unexplained chronic multisymptom illnesses for Gulf War veterans with Southwest Asia service (38 CFR 3.317) — the condition only has to appear to a compensable degree during service or by the current deadline, with no proof of cause.
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
38 CFR 3.317 + NASEM Gulf War and Health series
Fibromyalgia, chronic fatigue syndrome and undiagnosed multisymptom illness are PRESUMPTIVE for Southwest Asia service. Why it matters: Gulf-theater vet: presumptive — do not build a nexus you do not need.
Why fibromyalgia and gulf war illness claims get denied — and the fix
- Gulf War presumption missed; or rated 10 percent for "continuous medication" when symptoms were present more than a third of the time (20) or constant and refractory (40).
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 fibromyalgia and gulf war illness?
Fibromyalgia and Gulf War Illness is rated under diagnostic code 5025 / 6354 / 8850 (§ 4.71a · § 4.88b) at 10%, 20%, 40%, 60%, 100%. 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 fibromyalgia and gulf war illness?
The highest schedular rating available is 100%. Typical grants land around 20%, but every case is decided on its own evidence.
Is fibromyalgia and gulf war illness a presumptive condition?
Fibromyalgia, chronic fatigue syndrome and functional GI disorders are presumptive medically unexplained chronic multisymptom illnesses for Gulf War veterans with Southwest Asia service (38 CFR 3.317) — the condition only has to appear to a compensable degree during service or by the current deadline, with no proof of cause.
Do I need a nexus letter for fibromyalgia and gulf war illness?
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.