SSDI doesn't have a list of approved disabilities — it has a medical standard

Social Security doesn't say "we cover arthritis" or "we don't cover back pain." Instead, SSDI uses a single medical standard: your condition must prevent you from working for at least 12 months, or it must be terminal. That standard applies whether you have a named diagnosis or not.

What matters is not the name of your condition, but what your condition prevents you from doing. Someone with severe arthritis might meet the standard; someone else with mild arthritis might not. Someone with depression that responds to treatment might not; someone with depression that doesn't respond might.

Social Security maintains a reference called the Blue Book, which lists medical conditions and the specific findings that would typically meet the standard. But the Blue Book is a guide, not a gate. If your condition isn't listed, or if your case doesn't match the Blue Book description exactly, you can still be found to meet the standard.

Key Takeaways

  • SSDI requires that your condition prevent substantial work for at least 12 months or be terminal — not that you have a specific diagnosis.
  • Social Security's Blue Book lists conditions and the medical findings that typically meet the standard, but your condition doesn't have to be listed to may have access to.
  • The decision turns on what your condition prevents you from doing, not the condition's name or how common it is.
  • Medical evidence from your doctors — test results, imaging, treatment history, and functional limitations — is what Social Security uses to decide, not your own description of your symptoms.
  • You must have enough work credits to be insured, which means you must have worked and paid Social Security taxes for a certain period before you became disabled.

How Social Security defines disability for SSDI

The legal definition is narrow: you must be unable to engage in "substantial gainful activity" because of a medical condition. Substantial gainful activity means work that produces significant income — in 2024, that threshold is $1,550 per month for non-blind individuals and $2,590 for blind individuals. These amounts change yearly.

The condition must be expected to last at least 12 months or result in death. A broken leg that will heal in three months does not meet the standard. A condition expected to improve within a year does not meet it. But a condition that is permanent or long-term does, even if you might improve somewhat over time.

Social Security also considers whether you can do any other kind of work, not just your previous job. If your condition prevents you from doing your old job but you could do sedentary office work, you might not meet the standard. If it prevents you from any work you could reasonably do given your age, education, and work history, you might.

What the Blue Book is and how it's used

The Blue Book is Social Security's official listing of impairments — the conditions that, when documented in a specific way, typically meet the disability standard. It covers body systems: musculoskeletal disorders, cardiovascular disease, respiratory disease, neurological conditions, mental disorders, and many others.

For each condition, the Blue Book describes the medical findings that would support a disability decision. For example, the listing for major depressive disorder requires documented symptoms, treatment history, and functional limitations in specific areas — not just a diagnosis of depression.

If your medical records show findings that match a Blue Book listing, Social Security will usually find you disabled without needing to consider whether you could do other work. But if your case doesn't match a listing exactly, Social Security can still find you disabled by evaluating your functional capacity — what you can actually do — against the demands of available work.

Common conditions that meet the SSDI standard

Conditions that typically meet the standard are those that significantly limit your ability to function over a long period. These include severe arthritis with documented joint damage and functional loss; advanced cancer; heart disease with documented limitations; severe mental illness like schizophrenia or bipolar disorder with inadequate response to treatment; and neurological conditions like Parkinson's disease, multiple sclerosis, or ALS.

Chronic pain conditions, including fibromyalgia and chronic fatigue syndrome, can meet the standard, but they require detailed medical documentation showing the severity and functional impact. Back injuries and degenerative disc disease can meet it, but only when imaging and treatment records show significant structural damage and when conservative treatment has failed.

Intellectual and developmental disabilities, autism spectrum disorder, and traumatic brain injury can all meet the standard depending on the severity and functional impact. Diabetes, kidney disease, and liver disease can meet it when complications are documented and severe.

The key in every case is documentation. Social Security needs medical records from your doctors — not your own account of your symptoms, but test results, imaging, treatment history, and the doctor's own notes about what you can and cannot do.

Conditions that usually do not meet the standard

Conditions that are mild or moderate, or that respond well to treatment, typically do not meet the standard. Mild hypertension controlled by medication, mild arthritis without significant functional loss, and depression that responds to antidepressants usually do not may have access to, because they do not prevent substantial work.

Conditions expected to improve within 12 months do not meet the standard, even if they are severe right now. A severe infection that will resolve with antibiotics, a fracture that will heal, or a temporary mental health crisis that responds to treatment would not may have access to.

Conditions that are not documented do not may have access to. If you have not seen a doctor, have no test results, and have no medical records, Social Security cannot find you disabled, even if you believe your condition is severe. You must have medical evidence.

What medical evidence Social Security needs

Social Security bases its decision on medical records from your doctors, not on your description of your condition. You need records that show: a diagnosis from a medical professional; test results, imaging, or lab work that supports the diagnosis; treatment history showing what you have tried and how you responded; and the doctor's assessment of your functional limitations.

For mental health conditions, you need records from a psychiatrist or psychologist showing diagnosis, treatment, and functional impact. For physical conditions, you need records from the relevant specialist — a rheumatologist for arthritis, a cardiologist for heart disease, a neurologist for neurological conditions.

If you have not been treated by a doctor, or if your treatment is sporadic, Social Security may order a consultative examination — a one-time evaluation by a doctor Social Security pays. But this is not a substitute for ongoing medical care. The stronger your treatment history, the stronger your case.

How work credits affect which disabilities may have access to

Having a may have access to disability is only half the requirement for SSDI. You must also have earned enough work credits through employment and Social Security tax payments. The number of credits you need depends on your age when you became disabled.

If you became disabled before age 24, you need only six credits earned in the three years before you became disabled. If you became disabled between 24 and 31, you need credits equal to half the quarters since you turned 21. If you became disabled at 31 or older, you need 20 credits, with at least five earned in the 10 years before you became disabled.

You earn one credit for each $1,640 in covered earnings in 2024 (this amount changes yearly), up to four credits per year. If you have not worked enough to earn the required credits, you cannot receive SSDI, even if you have a severe disability. In that case, you might be able to receive Supplemental Security Income (SSI) instead, which has no work credit requirement but has strict income and asset limits.

Frequently Asked Questions

Can I get SSDI for a condition that's not in the Blue Book?

Yes. The Blue Book is a guide, not a complete list. If your condition is not listed, Social Security can still find you disabled by evaluating your functional capacity — what you can actually do — and comparing it to the demands of available work. You will need strong medical evidence showing your limitations.

What if my condition is getting better with treatment?

If your condition is expected to improve enough that you could return to work within 12 months, you do not meet the standard. But if you will have lasting limitations even with treatment, you might still may have access to. Social Security looks at your expected condition after treatment, not your current condition.

Do I need to be unable to work at all, or just unable to do my old job?

You must be unable to do any substantial work, not just your previous job. Social Security considers your age, education, and work history when deciding whether you could do other kinds of work. A 55-year-old with a high school education and a history of manual labor has different options than a 35-year-old with a college degree.

What happens if I don't have medical records?

Without medical records, Social Security cannot find you disabled. If you have not been treated by a doctor, start there. If you cannot afford treatment, look for community health centers or state disability programs that offer low-cost care. Social Security may order a consultative exam, but this is not a substitute for your own medical documentation.

Can I get SSDI while I'm still working part-time?

It depends on how much you earn. If your earnings are below the substantial gainful activity threshold ($1,550 per month in 2024), you might still may have access to. But if you are earning above that amount, Social Security will assume you can engage in substantial work and will likely deny your claim.