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If you have chronic fatigue syndrome (CFS), also called myalgic encephalomyelitis (ME/CFS), you can qualify for Social Security Disability Insurance (SSDI), but you need more than a diagnosis to win your disability claim.
The Social Security Administration (SSA) needs enough medical evidence to support a CFS diagnosis and recognize the syndrome as a medically determinable impairment (MDI). The agency also needs records showing that your symptoms prevent you from working. Therefore, your broader medical record must include medical history, exam findings, test results, and statements from your doctor (often called a medical source statement) showing how symptoms have limited your abilities over time.
This article explains how the SSA evaluates CFS for disability benefits, what evidence supports a CFS claim, and how to show the condition affects your ability to work.
An MDI is a physical or mental impairment established through medically acceptable evidence. CFS isn’t listed in the SSA’s Listing of Impairments so the agency needs medical evidence to recognize the condition as an impairment.
Your record should include your symptom history, relevant test results, and signs documented at exams, such as swollen or tender lymph nodes or persistent muscle tenderness. The SSA also considers other medical conditions that could cause your symptoms.
Your medical history can support the CFS diagnosis by showing when your symptoms began and when the same symptoms and exam findings appear across multiple visits. Treatment notes help document a pattern over time.
The SSA also considers your reported symptoms, but medical findings are needed to establish CFS as an MDI.
Several medical signs and diagnostic findings help establish CFS as an MDI. At least one qualifying medical sign must be documented for six months or longer.
This table shows some CFS signs.
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Get EvaluationChronic fatigue syndrome symptoms and exam findings can change from one visit to the next. One appointment won’t show how your symptoms and their severity fluctuate over time.
Records over weeks and months can show how long your symptoms have lasted, how often the same findings appear, and how your ability to function has changed. Treatment notes from multiple visits establish a pattern.
As mentioned above, a normal exam or a time when you feel better doesn’t change the larger pattern shown across your medical record.
After the SSA establishes CFS as an MDI, reviewers look at how your symptoms affect your ability to work, which is the central question in an SSDI claim for chronic fatigue syndrome. Reviewers don’t need to know if you can do a task once. They need to know if you can keep doing it all day and for a normal work week.
Fatigue, low stamina, and problems with concentration can affect how long you can keep working, how often you need breaks, and if you can maintain a steady pace.
Physical or mental activity can make CFS symptoms worse. This is called post-exertional malaise (PEM), and the effects can last long after the activity ends.
You may be able to finish a task once but feel more fatigue or other symptoms afterward, which is a hallmark of PEM. Those symptoms make it harder to repeat the same task later that day or the next day. The SSA is evaluating whether your condition prevents you from working at a level it calls substantial gainful activity (SGA).
CFS often causes brain fog that affects concentration, short-term memory, how quickly you can process information, and your ability to find the right words. Those symptoms can make it harder to follow instructions, stay focused, finish tasks, and maintain a normal pace at work.
For example, you might understand a task with several steps at first but lose track of the steps before you finish. Or you might be able to focus for a short time, but struggle to concentrate for an entire task.
The SSA looks at how these problems are documented in your records. Formal cognitive testing isn’t required in every CFS claim.
CFS can cause unrefreshing sleep, so you may wake feeling unrested even after a full night in bed. Lack of sleep may affect your alertness, concentration, pace, and stamina during the day. It can also make operating machinery or driving unsafe.
The SSA looks at how symptoms caused by poor sleep affect your ability to work. Your records need to explain what poor sleep does to you during the day and throughout the workweek rather than just noting that you have trouble sleeping.
If your records do not clearly establish CFS or show how your symptoms limit your ability to work, the SSA may need more information. To fill gaps in your record, the agency may request more medical records, ask you for additional information, or schedule a consultative exam.
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Get EvaluationResidual functional capacity (RFC) is the most you can do despite your limitations. The SSA uses your medical records and other evidence to create your RFC and determine if you can do your past work or adjust to other work.
Your RFC combines all of your documented work-related limits into one assessment. Reviewers look at your stamina, concentration, memory, pace, and documented problems to decide what tasks you can perform consistently. It considers how the combined effect of those limits affects your ability to work. Because CFS affects people differently, getting approved for SSDI depends on the limitations documented in your records.
As this article explains, a chronic fatigue syndrome SSDI claim requires the right medical evidence and documentation to show how your symptoms prevent you from working to SGA levels. Exactly what’s needed may be confusing.
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