Having one lung does not automatically may have access to you for SSDI, but it can if the condition prevents you from working
Social Security evaluates lung conditions—including having one lung—against a specific medical standard called the "Listing of Impairments." straightforward having one lung is not listed as an automatic approval. Instead, the Social Security Administration (SSA) looks at what your remaining lung can do: your oxygen levels at rest and during activity, how far you can walk, and whether you can perform work-related tasks without stopping to catch your breath.
The decision hinges on functional capacity, not anatomy. A person with one lung who maintains near-normal oxygen saturation and can walk a reasonable distance may not meet the listing. A person with one lung whose remaining lung is severely scarred or diseased—causing low oxygen levels or severe exercise limitation—is more likely to be approved. SSA will order pulmonary function tests and a six-minute walk test to measure this.
You must also have earned enough work credits to be insured. If you worked long enough before your condition worsened, you likely have them. If you became ill young or have not worked much, you may not. The work-credit requirement is separate from the medical decision.
Key Takeaways
- One lung alone does not meet an SSA listing; approval depends on how well your remaining lung functions, measured by oxygen levels and exercise tolerance.
- SSA will order pulmonary function tests and a six-minute walk test to determine whether your breathing limitation prevents substantial work activity.
- You must have earned enough work credits through prior employment; having a severe condition does not waive the insured-status requirement.
- If you do not meet the listing, SSA may still find you disabled through a residual functional capacity assessment that considers your age, education, and work history.
- Medical evidence from your pulmonologist or treating physician is critical; SSA will not rely on your description alone.
The SSA Listing for Chronic Lung Disease
SSA's listing for chronic obstructive pulmonary disease (COPD) and other chronic lung conditions is found in Section 3.02 of the Listing of Impairments. The listing does not name "one lung" specifically. Instead, it sets thresholds for lung function that your remaining lung must fail to meet.
To meet the listing, you must have either:
- FEV1 (forced expiratory volume in one second) at or below a specific threshold — this is the amount of air you can forcefully exhale in one second. The threshold depends on your height and age. For most adults, it is around 1.05 liters or less.
- Oxygen saturation at or below 88 percent on room air at rest — measured by a pulse oximeter during a standard office visit.
- Cor pulmonale with right ventricular hypertrophy — heart damage caused by chronic lung disease, shown on imaging.
If your remaining lung's function falls into one of these categories, you meet the listing and are approved without further evaluation. If it does not, SSA moves to the next step: assessing whether you can still do any work.
How SSA Tests Your Lung Function
SSA will not take your word for how breathless you are. The agency orders objective tests, usually at no cost to you, through a consultative examination (CE). The most common tests are:
- Spirometry — you breathe into a machine that measures how much air your lungs hold and how fast you can exhale. This produces your FEV1 and other values.
- Six-minute walk test — you walk at your own pace for six minutes while a technician measures how far you go and your oxygen level before, during, and after. A significant drop in oxygen or inability to walk far suggests your lung cannot support work activity.
- Chest X-ray or CT scan — to show scarring, fibrosis, or other structural damage to your remaining lung.
These tests are objective and reproducible. If you perform well on them, SSA will note that in the decision. If you perform poorly, that evidence supports approval. Effort and honesty matter; if you appear to be exaggerating or not trying, SSA will note that too.
When You Do Not Meet the Listing But Still Cannot Work
Many people with one lung do not meet the SSA listing because their remaining lung functions adequately at rest or during light activity. That does not end the case. SSA then performs a residual functional capacity (RFC) assessment.
The RFC describes what you can still do: Can you sit for eight hours? Can you walk a quarter mile? Can you climb stairs? Can you tolerate dust or fumes? Can you concentrate on a task? SSA uses your medical records, test results, and statements from your doctor to build this picture.
SSA then asks: given your age, education, and work history, are there jobs in the national economy you could perform with this reduced capacity? If the answer is no—for example, you are 58 years old, have a high school education, and your RFC allows only sedentary work with frequent breaks—you may be approved even though you do not meet the listing.
This route is harder to win because SSA must find that no jobs exist for you. It is not impossible, especially if you are older or have limited education. But it requires strong medical evidence and often a vocational informed's testimony.
The Role of Your Doctor's Statement
Your treating pulmonologist or primary care physician can provide powerful evidence. A detailed statement that describes your breathing limitations, how far you can walk, whether you need supplemental oxygen, and how your condition affects daily tasks carries weight with SSA.
A straightforward note saying "patient has one lung and cannot work" is not enough. SSA needs specifics: "Patient becomes short of breath after walking 100 feet on level ground" or "Patient requires supplemental oxygen during any exertion and cannot tolerate heat or humidity." Statements tied to objective test results are strongest.
If your doctor has not ordered pulmonary function tests or a six-minute walk test, ask for them. These tests create the record SSA needs to make a decision. Without them, SSA will order its own consultative exam, which may take months.
Work Credits and Insured Status
Even if your lung condition is severe enough to meet the listing or prevent work, you must be insured under Social Security rules. This means you must have earned enough work credits before your condition began.
For SSDI, you generally need 40 work credits, with at least 20 earned in the 10 years before you became disabled. Work credits are earned by paying Social Security taxes; you earn one credit per quarter of earnings (up to four per year). If you worked full-time for five years or more, you almost certainly have enough.
If you became ill young or have not worked much, you may not have 40 credits. In that case, you do not may have access to for SSDI, even with a severe condition. You might may have access to for Supplemental Security Income (SSI) instead, which has no work-credit requirement but has strict income and asset limits.
What to Expect in the SSDI Process
If you file for SSDI with one lung, SSA will request your medical records from all treating providers. This usually takes four to six weeks. SSA will then review them and likely order a consultative exam—pulmonary function tests and possibly a six-minute walk test.
The exam results come back in another four to eight weeks. SSA's medical consultant (a physician or psychologist) reviews the exam, your records, and the listing criteria. If you meet the listing, you are approved. If you do not, a disability examiner performs the RFC assessment and vocational analysis.
The entire process typically takes three to six months for an initial decision. If SSA denies you, you can request reconsideration (another review) or appeal to an administrative law judge (ALJ). Many people are approved on appeal after presenting stronger medical evidence or testimony from their doctor.
Frequently Asked Questions
If I had one lung removed surgically, do I automatically get SSDI?
No. SSA looks at how your remaining lung functions after recovery, not the surgery itself. Many people recover well from pneumonectomy and return to work. You must show that your remaining lung's function prevents substantial work activity, through pulmonary function tests and a six-minute walk test.
What if my oxygen level drops only during exercise, not at rest?
That is still relevant. SSA's listing includes a criterion for oxygen saturation during a six-minute walk test. If your oxygen drops significantly during walking, that can support approval. Even if you do not meet the listing, a large drop during exercise strengthens your RFC argument that you cannot sustain work activity.
Can I work part-time and still get SSDI with one lung?
SSDI requires that you cannot engage in substantial gainful activity (SGA). In 2024, SGA is generally defined as earning more than $1,550 per month. You can work below that threshold and still receive SSDI. Once you earn above it consistently, your benefits may stop, though work incentives like the trial work period allow you to test your ability to work.
What if SSA denies me and says I can do sedentary work?
You can appeal to an administrative law judge. At the hearing, you can present updated medical evidence, testimony from your doctor about your functional limits, and your own testimony about what happens when you try to work. Many denials are reversed on appeal when stronger evidence is presented.
Do I need a lawyer to file for SSDI with one lung?
You do not need one to file, but a lawyer or advocate familiar with SSDI and pulmonary conditions can strengthen your case by gathering the right medical evidence, requesting the right tests, and presenting your case clearly. Lawyers are paid only if you win, from your back pay.