Beyond Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: Redefining an Illness
Institute of Medicine Committee on the Diagnostic Criteria for Myalgic Encephalomyelitis/Chronic Fatigue Syndrome · National Academies Press · 2015 · DOI
Quick Summary
The US Institute of Medicine reviewed over 9,000 scientific articles to establish new diagnostic criteria for ME/CFS. The report introduced SEID (Systemic Exertion Intolerance Disease) as a proposed name and established that ME/CFS is a serious, chronic, complex systemic disease. New criteria require PEM, unrefreshing sleep, plus cognitive impairment or orthostatic intolerance.
Why It Matters
This landmark report legitimized ME/CFS as a serious biological disease in the US healthcare system. By requiring PEM for diagnosis, it created a more specific case definition that reduces misdiagnosis. It has shifted clinical education and healthcare policy.
What This Study Does Not Prove
Diagnostic criteria cannot prove causation or guide treatment. The IOM report was a clinical synthesis, not an experimental study.
Topics
Tags
Metadata
- DOI
- 10.17226/19012
- Control group
- No
- Review status
- Editor reviewed
- Evidence level
- Established evidence from major reviews, guidelines, or evidence maps
- Last updated
- 7 April 2026